NDA Math Matrices

If X is a matrix of order 3×3,Y is a matrix of order 2×3 and Z is a matrix of order 3×2, then which of the following are correct?
1. (ZY)X is a square matrix having 9 entries.
2. Y(XZ) is a square matrix having 4 entries.
3. X(YZ) is not defined.
Select the correct answer using the code given below :