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'.

Q: Problem: the unit digit in the product ( 891 * 781 * 912 * 463 ) is : 
Options: a ) 2 , b ) 5 , c ) 6 , d ) 8 , e ) 10

A: c
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Q: Problem: the sum of three consecutive even numbers multiples of 3 is 72 . what is the largest number ? 
Options: a ) 21 , b ) 24 , c ) 27 , d ) 36 , e ) none

A: c
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Q: Problem: what is the remainder when 7 ^ 74 - 5 ^ 74 is divided by 2 ? 
Options: a ) 5 , b ) 1 , c ) 2 , d ) 3 , e ) none of these

A:
e
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