Question

First prime minister of india before indo-pak division

Answer 1

The first Finance Minister of independent India was R. K. Shanmukham Chetty, who also presented its first Budget. The incumbent Arun Jaitley, of the Bharatiya Janata Party, has held office since 26 May 2014.
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Answer 2

There was no Prime Minister of India before Indo-Pak division but Jawahar Lal Nehru was the head of Interim government formed on September 2, 1946. The Nehru was head of interim government under the title of Vice-President of Viceroys Executive Council but played a similar role of a Prime Minister until Indo-Pak division or Independence.

After Independence Nehru became the first Prime Minister of India.