By which one of the following Acts was the Governor General of Bengal designated as the Governor General of India?

1. The Regulating Act of 1773 created the office of the Governor General of Bengal and established a council to assist him, making Warren Hastings the first Governor General of Bengal. 2. The Pitt's India Act of 1784 established a system of dual control over the East India Company but did not change the designation of the Governor General. 3. The Charter Act of 1793 renewed the company's charter and made minor administrative adjustments but did not alter the designation. 4. The Charter Act of 1833 marked a significant step towards centralization. It designated the Governor General of Bengal as the Governor General of India and vested in him all civil and military powers. Lord William Bentinck became the first Governor General of India. 5. Therefore, the Charter Act of 1833 is the correct Act.