A. 41
B. 42
C. 43
D. 44
E. 45

Answer: E

Explanation:
A number divisible by 3 and 5 is also divisible by 15.
a=3k
a=5q
So,
a=15m

Similarly,
b=15n

So,
a-b=15(m-n)
So, the difference of two numbers should also be divisible by 15.
So only answer choice 45 is divisible by 15.

Hence the answer is E.

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