Question: What present Indian District in the State of Assam is Areca Nut a prominent business?

Context paragraphs:
Tangla: Tangla is a town and a town area committee in earlier Darrang district and present Udalguri district in the Indian state of Assam.  It was a prominent business place Jute, Beetle Nut, Rice etc. and a host of small scale industries and centre of culture in erstwhile Darrang district.  Mangaldai-Bhooteachang Road passes through Tangla Town connecting numerous Tea Estates along Indo-Bhutan Border.  Tangla is famous for its weekly markets which is held on every Tuesday and Friday where vendors from the town itself and far flung areas come to trade in their Vegetables, Garments, Livestock etc.

Siddapura, Uttara Kannada: Siddapura Kannada: ಸಿದ್ದಾಪುರ ) is a town and the headquarters of Siddapur taluk, located in the Uttara Kannada district of the state of Karnataka in southern India.  It is nestled among the Western Ghats.  The town is surrounded by forest and the region is popular for a large number of waterfalls.  Sirsi is the Nearest Large City.  Adike (Areca nut) is the primary crop grown in the villages that surround the town.

Khasi and Jaintia Hills: The Khasi and Jaintia Hills are a mountainous region that was mainly part of Assam and meghalaya. The Assam Legislative Assembly This area is now part of the present Indian constitutive state of Meghalaya(formerly Assam), which includes the present districts of East Jaintia Hills district, headquarter Khliehriat, West Jaintia Hills district, headquarter Jowai, East Khasi Hills district, headquarter Shillong, and West Khasi Hills district, headquarter Nongstoin.

Duggaladka: Duggaladka is a place in Sullia taluk and village in the Dakshina Kannada district of the state of Karnataka, India.  It is a small town, surrounded with evergreen wooded mountains in the Western Ghats range in South India.  Duggaladka has plantations of rubber, areca nut, coconut, cashew nut, black pepper and banana.  State highway that connects Sullia and Kukke Subramanya runs through Duggaladka.  Duggaladka is situated 10 km from Sullia and 30 km from Kukke Subramanya.

Khasi people: The Khasi people, endomym কি খুন ইউ হেননিয়েট্রেপ , Ki Khun U Hynñiewtrep ("Children of the Seven Huts"), are an indigenous tribe, the majority of whom live in the State of Meghalaya which is in the north eastern part of India, with a significant population in the border areas of the neighbouring state of Assam, and in certain parts of Bangladesh.  The Khasi people are the native people of Meghalaya and forms the majority about 50.2% or 1.72 million of the state population.  Their language, Khasi, is categorised as the northernmost Austroasiatic language.  Primarily an oral language, the Bengali script was used to write Khasi after the arrival of Christian missionaries.  Particularly significant in this regard was a Welsh evangelist, Thomas Jones, who transcribed the Khasi language into the Roman script.  The Khasi people form the majority of the population of the eastern part of Meghalaya, and is the state's largest community.  Though around 85% of the Khasi populace have embraced Christianity, a substantial minority of the Khasi people still follow and practice their age old indigenous religion, which is known as "Ka Niam Khasi" and it is their belief that the rooster (U Syiar Khraw Jutang) is sacrificed as a substitute for man, it being thought that the rooster "bears the sins of men and by its sacrifice, man will obtain redemption" (compare Kapparot).  Other religions practised among the Khasis include Roman Catholic, Anglican, Unitarian, Presbyterian (largest Christian denomination among the Khasis), and others.  A small number of Khasis, as a result of inter-community marriages, are also Muslims.  There is also a very small number of Khasi Hindus inhabiting the Jaintia Hills of Meghalaya.  The main crops produced by the Khasi people are betel leaf, areca nut, oranges, local rice, vegetables, etc.

Sirsi, Karnataka: Sirsi is a city in the Uttara Kannada district in the Indian state of Karnataka.  Sirsi was also known as Kalyanapattana during the Sonda Dynasty.  It is a tourist destination with a population of 95,574.  It is the largest city and main commercial centre and business hub in Uttara Kannada district.  The city is surrounded by forest and the region is popular for a large number of waterfalls.  Hubli and Shimoga are the nearest large cities.  The main businesses around the city are mostly subsistence and agriculture based.  Adike (Supari) (Areca nut) or (betel nut) is the primary crop grown in the villages that surround the city, making it one of the major trading centres for Arecanut.  The nuts grown there are transported all over India, and also exported abroad.  The region is also popular for many other spices such as cardamom, pepper, betel leaves and vanilla.  The major food crop is paddy.

Leucopelargonidin: Leucopelargonidin is a colorless chemical compound related to leucoanthocyanins.  It can be found in "Albizia lebbeck" (East Indian walnut), in the fruit of "Anacardium occidentale" (Cashew), in the fruit of "Areca catechu" (Areca nut), in the fruit of "Hydnocarpus wightiana" (Hindi Chaulmoogra), in the rhizome of "Rumex hymenosepalus" (Arizona dock), in "Zea Mays" (Corn) and in "Ziziphus jujuba" (Chinese date).

Areca nut: The areca nut ( or ) is the seed of the areca palm ("Areca catechu"), which grows in much of the tropical Pacific (Melanesia and Micronesia), Southeast and South Asia, and parts of east Africa.  This seed is commonly referred to as betel nut so it is easily confused with betel (Piper betle) leaves that are often used to wrap it (paan).  The term areca originated from a South Asian word, Malayalam: Adakka (അടക്ക) during the 16th century, when Dutch and Portuguese sailors took the nut from Kerala to Europe.  Consumption has many harmful effects on health and is carcinogenic to humans.  Various compounds present in the nut, most importantly arecoline (the primary psychoactive ingredient which is similar to nicotine), contribute to histologic changes in the oral mucosa.  As with chewing tobacco, its use is discouraged by preventive efforts.

Sutiya community: Sutiya (Assamese: চুতীয়া) is an Indigenous Assamese community or an ethnic group originating from the Indian state of Assam and are the descendants of the Sino-Tibetan family of Mongoloid stock.  The earliest recorded history about the Sutiyas is found in the Assamese chronicle, which names Assambhina as the first Sutiya king to dwelt on the banks of the Brahmaputra in the 7th century A.D.  The Sutiya people through the Sutiya dynasty formed their kingdom in the present Indian states of Assam and Arunachal Pradesh and reigned from 1187 to 1673.

Leucocyanidin: Leucocyanidin is a colorless chemical compound related to leucoanthocyanidins. Leucoyanidin can be found in "Aesculus hippocastanum" (Horse chestnut), "Anacardium occidentale" (Cashew, acajou), "Arachis hypogaea" (Earth Nut), "Areca catechu" (Areca nut), "Asimina triloba" (American custardapple), "Cerasus vulgaris" (Cherry), "Cinnamomum camphora" (Camphor), "Erythroxylon coca" (coca), "Gleditsia triacanthos" (Honey locust), "Hamamelis virginiana" (American Witch Hazel), "Hippophae rhamnoides" (Hippophae berry Sanddorn), "Hordeum vulgare" (Barley), "Humulus lupulus" (bine), "Hypericum perforatum" (perikon Amber), "Laurus nobilis", "Magnolia denudata" (Hsin-I Yulan-Magnolie), "Malva silvestris" (Blue mallow), "Musa acuminata × balbisiana" (Banana), "Nelumbo nucifera" (Baladi bean), "Pinus strobus" (Eastern white pine), "Prunus serotina" ssp.  serotina (black cherry), "Psidium guajava" (Common guava), "Quercus alba" (White oak), "Quercus robur" (Common oak), "Rumex hymenosepalus" (Arizona dock), "Schinus terebinthifolius" (Brazilian pepper tree), "Terminalia arjuna" (arjun), "Terminalia catappa" (Indian almond), "Theobroma cacao" (Cacao), "Drimia maritima" (Sea Squill), "Vicia faba" (bell-bean), "Vitis vinifera" (Common Grape Vine), "Zea Mays" (Corn, mais), "Ziziphus jujuba" (jujube, Chinese date).

Supporting paragraphs: Tangla Areca nut
Answer: Udalguri district