UGC NET Math Reasoning Q13

Question

Choose the correct statements:
A. x% of y is equal to y% of 100 x.
B. If 40% of 60% of (3/5) of a number is 504, then 25% of (2/5) of that number is equal to 350.
C. If A is 15% more than B, then B is ~13.04% less than A.
D. 10% of 5 and 5% of 10 add-up to 0.1.