单选题 If M and N are positive integers that have remainders of 1 and 3, respectively, when divided by 6, which of the following could NOT be a possible value of M+N?
(A) 86 (B) 52 (C) 34
(D) 28 (E) 10

【正确答案】 A
【答案解析】[解析] 根据题意M和N可分别表示为：
M=6m+1，N=6n+3
→M+N=6(m+n)+4
5个选项中只有86被6除时，余数为2。