Task: Question Answering
Input (English): Problem: a and b walk around a circular track . they start at 9 a . m . from the same point in the opposite directions . a and b walk at a speed of 2 rounds per hour and 3 rounds per hour respectively . how many times shall they cross each other before 12 : 00 p . m . ? 
Options: a ) 28 , b ) 27 , c ) 26 , d ) 25 , e ) 20
Output (English): e