Task: Question Answering
Input (English): Problem: among 250 viewers interviewed who watch at least one of the 3 tv channels namely a , bc . 116 watch a , 127 watch c , while 107 watch b . if 90 watch exactly two channels . how many watch exactly one channel ? 
Options: a ) 155 , b ) 160 , c ) 175 , d ) 190 , e ) 195
Output (English): a