A makes a contract with B to buy B’s horse if A survives C. This contract cannot be enforceed by law ?

Unless and until A dies in C’s life time

Unless and until C dies in A’s life time

A makes a contract with B to buy B’s horse if A survives C. This con

1.	A makes a contract with B to buy B’s horse if A survives C. This contract cannot be enforceed by law ?
A.	Unless and until C dies in A’s life time
B.	Unless and until A dies in C’s life time
C.	Both A and C dies
D.	None of above
Answer» B. Unless and until A dies in C’s life time