The correct option is D 738
Concept: For a number to be divisible by 6, it must be divisible by both 2 and 3.
732 is an even number hence, divisible by 2.
Also, the sum of digits is divisible by 3. hance, the number is divisible by 3 also.
∴732 is divisible by 6.
The next number, which is divisible by 6 is 732+6=738