By which of the following Acts the Governor General of Bengal was made the Governor-General of India?

By which of the following Acts the Governor General of Bengal was made

1.	By which of the following Acts the Governor General of Bengal was made the Governor-General of India?
A.	Regulating Act, 1773
B.	Pitt's India Act, 1784
C.	Charter Act, 1833
D.	Indian Councils' Act, 1861
Answer» D. Indian Councils' Act, 1861