Please help! Kindly also explain your answer if possible, thank you!

1. X sells to Y his white pregnant horse for only P10,000 in a state of drunkenness. On X's way home, he lost the money to a pickpocket. What is the effect if the contract is annulled?

a) X is not obliged to return the P10,000 because his consent is vitiated, although Y has to return the dog with the fruits.

b) X is obliged to return the P10,000 with interest and Y has to return the horse with the fruits.

c) X is not obliged to return the P10,000 because he did not benefit from it, although Y has to return the horse with the fruits.

2. A, 16 years old, by himself, sells his parcel of land for P500,000 to W. Upon receiving that payment, A deposited P150,000 in the bank then went to Palawan for vacation and spent P50,000 and the amount of P300,000 was invested by him in a certain business which failed. If A filed for an annulment upon reaching 18 years of age, what will be the effects?

a) A is bound to return only P200,000 which he used for his own benefit with legal interest while W is bound to return the land together with the value of the fruits received by him.

b) A is bound to return only P300,000 with legal interest and W is bound to return the land with the value of the fruits received by him.

c) A is bound to return the P500,000 with legal interest and W is bound to return the land with the value of the fruits received by him.

3. X was employed as a driver by a certain company. In their contract, it was stipulated that X will receive a P300 a day as salary when the minimum wage set by the law was P500 per day. X reluctantly agreed because he needed a job. Can X still recover the deficiency?

a) Yes, because this is an execution to the doctrine of in pari de licto.

b) No, because X knowingly agreed to the terms of the contract.

c) Yes, because of fraud.

d) No, because both parties violated the law.