Directions: Two quantities A and B are given in the following questions. You have to find the value to both A and B by using your knowledge of mathematics and choose the most suitable relation between the magnitude of A and B from the given options.

Quantity A - Find the sum given at 8%. A part of 16000 is given at 8% and other at 12% for 3 years under simple interest. Total interest after 3 years is Rs. 4680.

Quantity B - Amount if Rs. 8000 is invested at double the rate for 1 year. Amount invested under simple interest doubles itself in 16 years.