Step 1: Understand how multi-dimensional arrays work in C.
In C, a 2D array is stored in a contiguous block of memory. To access an element at , you use a pointer arithmetic approach.
- **Option 1**: is the correct way to access the element at , because it first calculates the address of the row and then accesses the column element.
Step 2: Evaluate other options.
- **Option 2**: This is not valid because is not a proper way to access the array element.
- **Option 3**: Incorrect, as this formulation tries to use multiplication on the array, which is not valid for accessing a specific element.
- **Option 4**: Incorrect. The formula does not correctly access the element at row and column .
Step 3: Conclusion.
Thus, the correct expression is **Option 1**.