Instructions: In this task, you need to answer the given multiple-choice question on the gain. Gain is the value by which to multiply the input. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.
Input: Problem: a shopkeeper loses 15 % , if an article is sold for $ 102 . what should be the selling price of the article to gain 20 % ? 
Options: a ) $ 165 , b ) $ 174 , c ) $ 144 , d ) $ 164 , e ) $ 183
Output:
c