A 3-digit number 4a3 is added to another 3-digit number 984 to give a 4-digit number 13b7, which is divisible by 11. Then, (a + b) = ?

A 3-digit number 4a3 is added to another 3-digit number 984 to give a

1.	A 3-digit number 4a3 is added to another 3-digit number 984 to give a 4-digit number 13b7, which is divisible by 11. Then, (a + b) = ?
A.	10
B.	11
C.	12
D.	15
Answer» B. 11