The correct option is B 48<M<50
We know that M is a whole number.
1. 48<M≤50
This represents M lies between 48 and 50, including 50 itself.
∴ There are two possibilities. M can be either 49 or 50.
2. 48<M<50
This represents M lies between 48 and 50, excluding 48 and 50.
∴ There is only one possibility, i.e., M can be only 49.
Hence, the required answer is 48<M<50.