Principle: Where one of the parties to a contract was in position to dominate the decision of the other party, the contract is enforceable only at the option of the party who was in a position to dominate decision of the other party.

Facts: A doctor asked his patient to make a payment of Rs. 10,00,000/- (Ten Lac Only) for treatment of his fever. The patient paid an amount of Rs. 5,00,000/- (Five Lac Only) and promised to pay the remaining amount after the treatment. After treatment the patient recovered from fever. The doctor demanded the remaining amount from the patient. The patient refused to pay.