A SOLD AN AUTOMOBILE TO B FOR 20,000 TO BE PAID AS FOLLOWS:

10,000 UPON DELIVERY OF THE CAR TO B, AND THE BALANCE AT THE RATE IF 2,000 EVERY THREE MONTHS THEREAFTER. THE AUTOMOBILE, HOWEVER, AS BURNED IN THE POSSESSION OF B, WITHOUT HIS FAULT, BEFORE PAYMENT OF THE BALANCE. IS B OBLIGED TO PAY THE BALANCE? REASON.