Which of the following vested the secretary of state for India with supreme control over the Government of India ?

The Government of India Act, 1858, also known as the Act for the Better Government of India, transferred the power to govern India from the East India Company to the British Crown [c4][t1]. This act created the office of the Secretary of State for India, a member of the British Cabinet, who was vested with complete authority and supreme control over the Indian administration [t1][t3]. The Secretary of State exercised powers previously held by the Court of Directors and the Board of Control, which were both abolished [c4][t1]. To assist the Secretary of State in managing Indian affairs from London, a 15-member advisory body called the Council of India was established [c4][t9]. While the Governor-General was redesignated as the Viceroy, he acted as the direct representative and agent of the Secretary of State, who remained ultimately responsible to the British Parliament [t1][t4].

Sources

1. [1] Rajiv Ahir. A Brief History of Modern India (2019 ed.). SPECTRUM. > Chapter 26: Constitutional, Administrative and Judicial Developments > Central Government > p. 525
2. [2] https://cbc.gov.in/cbcdev/crown/crown1.html