If x and y are positive integers, and (4x)/(3y) is an integer, which of the following must be true?
I) x is a multiple of 4.
II) y is a multiple of 3.
III) x·y is a multiple of 3.	Choose the correct choice from the following answers
A) I only B) II only C) III only D) I and II only E) I, II and III
For (4x)/(3y) to be an integer, x must be a multiple of 3. So, x * y is a multiple of 3.   Hence, C. ( rest two statements may or may not be valid)   ANSWER:III only
<result>C</result>
If x and y are positive integers, and (4x)/(3y) is an integer, which of the following must be true?
I) x is a multiple of 4.
II) y is a multiple of 3.
III) x·y is a multiple of 3.