Title: List of chief ministers of West Bengal
Content:  The chief minister of West Bengal is the chief executive of the eastern Indian state of West Bengal. The chief minister is the head of the executive branch of the government of West Bengal and is charged with enforcing state laws. Following elections to the West Bengal Legislative Assembly, the state's governor usually invites the party (or coalition) with a majority of seats to form the government. The governor appoints the chief minister, whose council of ministers are collectively responsible to the assembly. Given the confidence of the assembly, the chief minister's term is for five years and is subject to no term limits. In August 1947, the British Indian province of Bengal was partitioned into the Pakistani province of East Bengal and the Indian state of West Bengal. Since then West Bengal has had eight chief ministers, starting with Prafulla Chandra Ghosh of the Indian National 
Title: List of chief ministers of West Bengal
Content:  (INC) party as the premier. A period of political instability followed—West Bengal witnessed three elections, four coalition governments and three stints of President's rule between 1967 and 1972—before Siddhartha Shankar Ray of the INC served a five-year term. The landslide victory of the Communist Party of India (Marxist)-led Left Front in the 1977 election began Jyoti Basu's 23-year continuous reign as chief minister. The length of his tenure was an all-India record until 2018, when he was surpassed by Sikkim's Pawan Kumar Chamling. Basu's successor Buddhadeb Bhattacharya continued Communist rule in West Bengal for another decade, when the Left Front was defeated in the 2011 election by the All India Trinamool Congress. Sworn in on 20 May 2011, Trinamool leader Mamata Banerjee is West Bengal's incumbent chief minister, the first woman to hold the office. She was subsequently voted to power in 2016 and 2021 assembly elections.
Title: List of governors of Bengal Presidency
Content:  After the Independence, the state of West Bengal was headed by a Governor and his powers were laid down in the Government of India Act, 1935. On 15 August 1947, C. Rajagopalachari was appointed as the first Governor of West Bengal. When the constitution of India came into effect on 26 January 1950, the office of Governor of West Bengal became a ceremonial position.
Title: Prime Minister of Bengal
Content:  When Bengal was partitioned, the office was succeeded by the Chief Minister of West Bengal and the Chief Minister of East Bengal. All three Bengali premiers moved to East Bengal, where they continued to be influential statesmen. Nazimuddin served as East Bengal's chief minister, and later became Governor General and Prime Minister of Pakistan, Suhrawardy became Prime Ministers of Pakistan, while Huq served as East Bengal's chief minister, and later as East Pakistan's governor. The three premiers are considered the forerunners of politics in modern Bangladesh.
Title: All-India Yadav Mahasabha
Content: Chaudhary Brahm Prakash Yadav was the 1st chief minister of Delhi ; Prafulla Chandra Ghosh was the 1st chief minister of West Bengal ; Rao Birender Singh was the 2nd chief minister of Haryana ; Babulal Gaur Yadav was the 16th chief minister of Madhya Pradesh ; B. P. Mandal was the 7th chief minister of Bihar ; Daroga Prasad Rai was the 10th chief minister of Bihar ; Lalu Prasad Yadav was the 20th chief minister of Bihar ; Rabri Devi was the 21st chief minister of Bihar ; Ram Naresh Yadav was the 10th chief minister of Uttar Pradesh ; Mulayam Singh Yadav was the 15th chief minister of Uttar Pradesh ; Akhilesh Yadav was the 20th chief minister of Uttar Pradesh ; Siddaramaiah was the 22nd chief minister of Karnataka 
Title: List of governors of Bengal Presidency
Content:  divisions into a Presidency (or province) of Bengal under a Governor, the creation of a new province of Bihar and Orissa under a lieutenant-governor, and that Assam Province would be reconstituted under a chief commissioner. On 21 March 1912, Thomas Gibson-Carmichael was appointed the Governor of Bengal. On 22 March the provinces of Bengal, Bihar and Orissa and Assam were constituted. In 1947, India gained independence from the British Raj, and the new state of West Bengal was formed following the partition of India. C. Rajagopalachari was appointed as the first Governor of West Bengal. When the constitution of India came into effect on 26 January 1950, the office of Governor of West Bengal become a ceremonial position.
Title: East Bengal
Content:  Sir Khawaja Nazimuddin, a former Prime Minister of Bengal, was the first Chief Minister of East Bengal after partition. Nazimuddin was a senior leader of the Muslim League and a close confidante of Pakistan's founder Muhammad Ali Jinnah. Sir Frederick Chalmers Bourne was the first Governor of East Bengal. Partition resulted in making many Hindus to leave East Bengal while Muslims from different parts of the Indian subcontinent migrated to East Bengal. The East-West Bengal border did not see as much violence as seen in the Punjab border between North India and Pakistan. Jinnah made his sole visit to East Bengal as governor general in 1948. During a speech to students in Dhaka University, he resisted demands to make Bengali a federal language. His refusal sparked fierce protests among East Bengalis who comprised the majority of Pakistan's population. The proposal for Urdu as the sole national language met with strong opposition in East Bengal, where Urdu considered rather alien, especially in light in Bengali's rich literary heritage. When Jinnah died in 1948, Nazimuddin became the Governor General of Pakistan.
Title: 1946 Punjab Provincial Assembly election
Content:  Iftikhar Hussain Khan Mamdot became the first chief minister of West Punjab.
Title: West Punjab
Content:  The offices of Governor of West Punjab and Chief Minister of West Punjab lasted from 15 August 1947, until 14 October 1955. The first Governor was Sir Francis Mudie with Iftikhar Hussain Khan as the first Chief Minister. Both offices were abolished in 1955, when the province of West Pakistan was created. The last Governor of West Punjab, Mushtaq Ahmad Gurmani, became the first Governor of West Pakistan.
Title: West Pakistan
Content:  The office of Governor of West Pakistan was a largely ceremonial position but later Governors wielded some executive powers as well. The first Governor was Mushtaq Ahmed Gurmani, who was also the last Governor of West Punjab. Ayub Khan abolished the Governor's office and instead established the Martial Law Administrator of West Pakistan (MLA West). The office Chief Minister of West Pakistan was the chief executive of the state and the leader of the largest party in the provincial assembly. The first Chief Minister was Abdul Jabbar Khan who had served twice as Chief Minister of the Khyber Pakhtunkhwa Province prior to independence. The office of Chief Minister was abolished in 1958 when Ayub Khan took over the administration of West Pakistan.

Question: who was the first chief minister of west bengal?
Answer: Prafulla Chandra Ghosh.