To identify the Governor General of India during the 1857 Sepoy Mutiny:
1. Lord Canning was the Governor General of India during the 1857 Sepoy Mutiny.
2. His tenure was marked by significant events leading up to and during the rebellion.
3. The other individuals listed served as Governor General at different times but not during the 1857 mutiny.
Therefore, the correct answer is (4) Lord Canning.