Task: Question Answering
Input (English): Problem: given a two - digit number , the unit ' s digit exceeds its 10 ' s digit by 5 and the product of the given number and the sum of its digits is equal to 90 , which of the options is the number ? 
Options: a ) 27 , b ) 16 , c ) 38 , d ) 61 , e ) 83
Output (English): a