Under the Transfer of Property Act, 1882, in which of the following gifts is the condition attached to…

Section 31 of the Transfer of Property Act, 1882 allows a transfer to provide that the interest shall cease if a specified uncertain event happens or does not happen, so the gift of a house "on the condition that the gift will be forfeited if B does not reside in it" carries a valid condition. A condition requiring B to murder C is forbidden by law and makes the transfer void under section 25. A condition ending B's interest on his insolvency is void under section 12, and a condition requiring B to set fire to C's house is invalid under section 32 because the event is unlawful.