Let A = 100x + 10y + z
B = 100z + 10y + x
B – A = 99(z – x) As (B – A) is divisible by 7 and 99 is not, (z – x) is divisible by 7
z and x can have values (8, 1) or (9, 2) y can have any value from 0 to 9.
A = 1y8 or 2y9
Lowest possible value of A is 108 and the highest possible value of A is 299.
Hence, option (2)106 < A < 305 is the Answer.