Multi Choice Type QuestionWhich of the following scenarios can lead to a dangling pointer?Marks : 1Negative Marks : 0Answer hereReturning a pointer to a local variable from a functionUsing malloc() for memory allocationAssigning a pointer to another pointerDeclaring a pointer inside main()

The correct answer is "Returning a pointer to a local variable from a function".

Here's why:

1. "Returning a pointer to a local variable from a function": This can lead to a dangling pointer because local variables are stored on the stack, and they get destroyed once the function call is over. So, if you return a pointer to such a local variable, the pointer will point to a location that is no longer valid, hence it becomes a dangling pointer.

2. "Using malloc() for memory allocation": This does not lead to a dangling pointer. malloc() is used to dynamically allocate memory in the heap, and the memory remains valid until it's explicitly deallocated using free(). So, unless the memory is freed and the pointer is still used, it won't become a dangling pointer.

3. "Assigning a pointer to another pointer": This also does not lead to a dangling pointer. When you assign a pointer to another pointer, both pointers will point to the same memory location. Unless the memory is deallocated while one of the pointers is still in use, neither of the pointers will become dangling.

4. "Declaring a pointer inside main()": This does not lead to a dangling pointer. The pointer will be valid as long as the main() function is running. It will only become invalid when the program ends, at which point all pointers become invalid anyway.