If A and B are square matrices of order $n \times n$, then $(A-B)^2$ is equal to: A. $A^2-A B-B A+B^2$ B. $A^2-2 A B+B^2$ C. $A^2-2 B A+B A$ D. $A^2-B^2$ E. $A^2+2 A B+B^2$ Choose the correct answer from the options given below:

E only C and E only A only A and C only

A only

The correct answer is Option (3) → A only