If k is the sum of the digits of integer m, and m=13n, where n is an integer, which of the following must be true?	Options.
A) k is a multiple of 6 B) The sum of the digits of k is divisible by 3 C) m is a multiple of 10k D) k is divisible by 2 E) value of k contains prime number also
m= 13n i.e n =1,2,3 ,4 etc or -1,-2.-3 ,-4 then m =13,26,39,52 or -13 ,-26 ,-39 ,-52 then k 4,8,12,7, or -(1+3) , -(2+6) , -(3+9) ,-(5+2) .   ans value of k contains prime number also
<result>E</result>
If k is the sum of the digits of integer m, and m=13n, where n is an integer, which of the following must be true?