Title: Constitution of India
Content:   The constitution was drafted by the Constituent Assembly, which was elected by elected members of the provincial assemblies. The 389-member assembly (reduced to 299 after the partition of India) took almost three years to draft the constitution holding eleven sessions over a 165-day period. Dr. B. R. Ambedkar was a wise constitutional expert, he had studied the constitutions of about 60 countries. Ambedkar is recognised as the "Father of the Constitution of India". In the constitution assembly, a member of the drafting committee, T. T. Krishnamachari said: ""Mr. President, Sir, I am one of those in the House who have listened to Dr. Ambedkar very carefully. I am aware of the amount of work and enthusiasm that he has brought to bear on the work of drafting this Constitution. At the same time, I do realise that that amount of attention 
Title: Political families of India
Content: B. R. Ambedkar (1891-1956) - Father of the Constitution of India, first Minister of Law and Justice, Member of Parliament, Rajya Sabha, labour member of the Viceroy's Executive Council, opposition leader in the Bombay Legislative Assembly, member of the Bombay Legislative Council ; Yashwant Ambedkar (1912-1977) - Leader of the Republican Party of India, member of the Maharashtra Legislative Council (son of B. R.) ; Prakash Ambedkar - Leader of the Vanchit Bahujan Aghadi, former Lok Sabha and Rajya Sabha MP (son of Yashwant) ; Anandraj Ambedkar - Leader of the Republican Sena and the Vanchit Bahujan Aghadi (son of Yashwant) ; Sujat Ambedkar (born 1995) — Activist, leader of the Vanchit Bahujan Aghadi (son of Prakash) 
Title: Constitution Day (India)
Content:  Since 2015 was the 125th birth anniversary year of B. R. Ambedkar (14 April 1891 – 6 December 1956), who is known as the father of the Indian constitution, the government decided in May 2015 to celebrate this year "in a big way". A special committee chaired by Prime Minister of India was announced for year-long celebrations. Various programmes will be held by various ministries and departments throughout the year to spread thoughts and ideas of Ambedkar. As part of the celebrations while laying foundation stone for an Ambedkar memorial at the Indu Mills compounds in Mumbai in October 2015, the Prime Minister of India Narendra Modi announced that 26 November will be celebrated as "Constitution Day". In November 2015, the government officially announced celebration of the day.
Title: History of Maharashtra
Content:  endures. As the nation's first Law and Justice Minister, Ambedkar played a pivotal role in writing the constitution of India and is considered the Father of the Indian Constitution. The ultimatum in 1942 to the British to Quit India was given in Mumbai and culminated in the transfer of power and the independence of India in 1947. Raosaheb and Achutrao Patwardhan, Nanasaheb Gore, Shreedhar Mahadev Joshi, Yeshwantrao Chavan, Swami Ramanand Bharti, Nana Patil, Dhulappa Navale, V.S. Page, Vasant Patil, Dhondiram Mali, Aruna Asif Ali, Ashfaqulla Khan and several other leaders from Maharashtra played a prominent role in this struggle. B.G. Kher 
Title: Alexander Goldenweiser (anthropologist)
Content: Dr B. R. Ambedkar, chief architect of the Constitution of India (14 April 1891- 6 December 1956) 
Title: Prem Behari Narain Raizada
Content:  for hand-writing the constitution, Raizada replied, “Not a single penny. By the grace of God I have all the things, and am quite happy with my life,” “But I have one reservation—that on every page of Constitution I will write my name and on the last page I will write my name along with my grandfather’s name.” Prem Behari Narain Raizada was the calligrapher of the Indian Constitution. The original constitution was written by him in a flowing italic style. The Calligraphy of the Hindi version of the Original Constitution was done by Vasant Krishan Vaidya. Working in a room in Constitution Hall 
Title: Political families of Maharashtra
Content: B. R. Ambedkar (1891 - 1956) - The Father of the Constitution of India, 1st Minister of Law and Justice, Member of Parliament (Rajya Sabha), Labour Member of Viceroy's Executive Council, Leader of the Opposition in the Bombay Legislative Assembly and Member of the Bombay Legislative Council. ; Yashwant Ambedkar (1912 - 1977) - Son of B. R. Ambedkar, leader of Republican Party of India and a member of the Maharashtra Legislative Council. ; Prakash Ambedkar - Son of Yashwant Ambedkar, leader of the Vanchit Bahujan Aghadi, and the former Member of the Parliament (Lok Sabha and Rajya Sabha). ; Sujat Ambedkar - Son of Prakash Ambedkar, Activist and Leader of the Vanchit Bahujan Aghadi. ; Anandraj Ambedkar - Son of Yashwant Ambedkar, Leader of Republican Sena and the Vanchit Bahujan Aghadi. The Ambedkar Family 
Title: List of national founders
Content:   Mahatma Gandhi (1869–1948) is considered the father of the nation and one of the most prominent leaders of the Indian independence movement. He is regarded as the founder of the modern Republic of India. He is featured on the Indian rupee.
Title: Government Law College, Mumbai
Content: Bal Gangadhar Tilak, Indian freedom fighter, famous as Father of Indian Discontent and one of the First Generation of Indians to have graduated. ; B. R. Ambedkar, former Principal, first Law Minister of India and Chairman, Drafting Committee of the Constitution of India ; Sir Dinshah Fardunji Mulla, former Principal, Privy Councilor, founding partner of Mulla & Mulla ; Nanabhoy Palkhivala, former Professor, noted Constitutional Lawyer ; M. C. Chagla, former Professor, Chief Justice of Bombay High Court ; Ram Jethmalani, former Professor, noted Criminal Lawyer, ; Homer Pithawalla, Noted Professor; Solicitor of the Supreme Courts of India, England and Hong Kong  Throughout its history, the college has had the honour of guidance from eminent legal luminaries who have adorned benches of the Supreme Court of India and the Bombay High Court. The long list of legends include:
Title: Alladi Krishnaswamy Iyer
Content: Austin, G. 1966. The Indian Constitution: Cornerstone of a Nation. Clarendon Press, Oxford. 

Question: who is known as the father of indian constitution?
Answer: Bhimrao Ramji Ambedkar.