**Concept: The question tests on the basics of Number Properties**

**Solution:**

Given 3x = 200 -4y

=> 3x = Difference of even numbers = even

=> As 3 is odd x must be even (So A & C eliminated)

Also it is a difference of multiples of 5 => 3x is also a multiple of 5

=> x is a multiple of 5 as 3 is not =>So 10**(option e)**