In this task, you need to answer the given multiple-choice question on the physics. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Example Input: Problem: a man can row a distance of 5 km in 60 min with the help of the tide . the direction of the tide reverses with the same speed . now he travels a further 30 km in 10 hours . how much time he would have saved if the direction of tide has not changed ? 
Options: a ) 2 , b ) 8 , c ) 4 , d ) 6 , e ) 5
Example Output: c

Example Input: Problem: express 35 mps in kmph ? 
Options: a ) 122 , b ) 188 , c ) 126 , d ) 140 , e ) 124
Example Output: c

Example Input: Problem: the length of a rectangular plot is 20 metres more than its breadth . if the cost of fencing the plot @ rs . 26.50 per metre is rs . 6095 , what is the length of the plot in metres ? 
Options: a ) 333 , b ) 200 , c ) 230 , d ) 276 , e ) 1999
Example Output:
c