Task: Question Answering
Input (English): Problem: if 1.5 cm of a pencil is purple , 0.5 cm of the remaining is black and the remaining 2 cm is blue , what is the total length of the pencil ? 
Options: a ) 5 cm , b ) 3 cm , c ) 1 cm , d ) 4 cm , e ) 2 cm
Output (English): d