32.
The answer is: A
Explanation
The correct answer is A: A is not liable to B upon indemnity.
This is because, according to Section 224 of the Indian Contract Act, 1872, where one person employs another to do an act which is criminal, the employer is not liable to the agent, either upon an express or an implied promise, to indemnify him against the consequences of that act. In this case, publishing a libel upon C is a criminal act, and A employed B to do it. Therefore, A is not liable to indemnify B against the damages and expenses that B had to pay to C.