By selling 16 pencils for a rupee a man loses 10%. How many for a rupee should he sell in order to gain 20%?  Choose the correct choice from the following answers:
A) 8
B) 9
C) 12
D) 89
E) 81

Rationale: "90 % - - - 16 120 % - - - ? 90 / 120 * 16 = 12 answer : c"
Answer: C