Andy owes Brandy P1 million. Candy, in behalf of Andy, pays Brandy P1 million against the consent of Andy, although Candy had previously told Andy that she (Candy) did not intend to be reimbursed. Needless to say, Brandy accepted the payment by Candy in behalf of Andy.

a. Is Andy's obligation towards Brandy extinguished?

b. May Candy still recover from Andy, because of the fact that Andy did not consent to what the law deems a donation on the part of Candy in favor of Andy?