Task: Question Answering
Input (English): Problem: the diameter of the driving wheel of a bus in 140 cm . how many revolutions per minute must the wheel make in order to keep a speed of 14 kmph ? 
Options: a ) 53.03 , b ) 50.01 , c ) 23.23 , d ) 24.23 , e ) 41.23
Output (English): a