If 60% of A = 30% of B, B = 40% of C and C = x% of A, then value of x is :

Answer: Option D

According to the question,
A : B : C
1 : 2 : 5 ( 60A = 30B)
$$\frac{A}{B}$$ = $$\frac{1}{2}$$
C = 5
A = 1
Required answer = $$\frac{5}{1}$$ × 100 = 500%