Could the viceroy of India oppose the royal marriage?

Was the viceroy of India powerful enough to challenge this marriage arrangement?

Acquiescence is expected after royal approval, despite the viceroy's considerable authority within India.

The viceroy's considerable authority within India is distinguished from his freedom to challenge the monarch. The officeholder's position within the British aristocratic and appointment system limits that independence. Once the king had approved the hypothetical marriage, the expectation is that the viceroy would acquiesce despite any private reservations.