In how many years Rs 200 will produce the same interest at 10% as Rs. 1000 produce in 2 years at 12%  Choose the correct choice:
A) 13
B) 9
C) 11
D) 12
E) 10

Rationale: explanation : clue : firstly we need to calculate the si with prinical 1000 , time 2 years and rate 12 % , it will be rs . 240 then we can get the time as time = ( 100 * 240 ) / ( 200 * 10 ) = 12 option d
Answer: D