All i am worried about is "fewer than 2" that means.. its less than 2.. and not 2...
Consider option 1...
If we take 3 as the minimum number...
then multiples could be... 3,6,9,12....where atleast 2 are multiples of 3..
Now, of we sat that fewer than 2 in first 5 are multiples of 12.. means..
12 should appear just once in first 5 numbers...
3,6,9,12,15..
6,12,16,24,30
So.. with the help of B alone we can say that the number M is not a multimpe of 6 but is a multiple of 3!