Relative Pronoun Review

Cleo and Cindy, which are twins, both want to be doctors someday.

Cleo and Cindy, whom are twins, both want to be doctors someday.

Cleo and Cindy, who are twins, both want to be doctors someday.

Cleo and Cindy, whose are twins, both want to be doctors someday.

Would you please tell me to who I am to give this money?

Would you please tell me to which I am to give this money?

Would you please tell me to that I am to give this money?

Would you please tell me to whom I am to give this money?

Will's blue jeans, which his mom had bought for him a week ago, already have a hole in them.

Will's blue jeans, who his mom had bought for him a week ago, already have a hole in them.

Will's blue jeans, that his mom had bought for him a week ago, already have a hole in them.

Will's blue jeans, whom his mom had bought for him a week ago, already have a hole in them.