The correct option is B Charter Act, 1833
The office of Governor General of India was created by Charter Act, 1833. Until 1833, the title of the position was "governor-general of Bengal". The Government of India Act 1833 converted the title into "governor-general of India". The title "viceroy and governor-general" was first used in the queen's proclamation appointing Viscount Canning in 1858.