Task: Question Answering
Input (English): Problem: when positive integer n is divided by 5 , the remainder is 1 . when n is divided by 7 , the remainder is 3 . what is the smallest positive integer k such that k + n is a multiple of 36 . 
Options: a ) 5 , b ) 4 , c ) 12 , d ) 32 , e ) 35
Output (English): a