Lord William Bentinck was Governor-General of India (1828–1835).
He approved Macaulay’s Minute and issued the resolution of 7 March 1835 making English the medium of instruction in higher education.
While the wording of the quote resembles Macaulay’s style, Macaulay wrote as Law Member of the Governor-General’s Council, not as the Governor-General himself.
The official policy change — which the question is likely pointing to — came under Bentinck’s authority. Thus, many exam questions credit the statement or policy to him.
Macaulay wrote the famous Minute (1835).
Bentinck endorsed it officially in a resolution.
Therefore, in a government context, the policy statement becomes associated with Bentinck.