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

Example Input: Problem: if a is a positive integer , and if the units digit of a ^ 2 is 9 and the units digit of ( a + 1 ) ^ 2 is 4 , what is the units x digit of ( a + 2 ) ^ 2 ? 
Options: a ) 1 , b ) 3 , c ) 5 , d ) 6 , e ) c . 14
Example Output: a

Example Input: Problem: find the least number which when divided by 18,32 , 48,52 leaves remainder 14,28 , 44,48 respectively . 
Options: a ) 2845 , b ) 3250 , c ) 3740 , d ) 4150 , e ) 5140
Example Output: c

Example Input: Problem: the number of boxes in a warehouse can be divided evenly into 6 equal shipments by boat or 27 equal shipments by truck . what is the smallest number of boxes that could be in the warehouse ? 
Options: a ) 27 , b ) 33 , c ) 54 , d ) 81 , e ) 162
Example Output:
c