By selling 22 pens for a rupee a woman loses 10%. How many for a rupee should he sell in order to gain 50%?  Choose the correct choice from the following choices:
A) 12  B) 14  C) 45  D) 13  E) 65

Rationale: "d 90 % - - - 22 150 % - - - ? 90 / 150 * 22 = 13"
Answer: D