Modern Indian History
Federal form of governments at centre was introduced in India under

Government of India Act of 1935
Government of India Act of 1909
Indian Independence Act of 1947
Indian Councils Act of 1909

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Modern Indian History
The immediate cause of the Battle of Plassey was

The English attempts to strengthen their fortifications at Fort William
The English support and asylum to the political rivals of Nawab Siraj-ud-Daulah
Siraj-ud-Daulah's attack on Fort William and capture of Calcutta (Alinagar)
Misuse of Dastaks (passes for free trade) by the Company and its officials

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