IMO it is b
Totall sum is 5x and sum of 2 smallest number should be less than sum of 3 largest number.
any of A is not possible as 6x is greated than 5x
for other case
C. sum of two smallest number is 5x -5x/3 =10x/3 and this is greater than 5x/c so eliminate..
similarly for d and e