Question: What is true about the variable named `ptr`?

1. It is a pointer initialized at NULL.
2. It is a pointer to a void function.
3. That declaration causes a compiler error, as pointers must specify a type.
4. It is a pointer to a value with no specific type, so it may be cast to point to any type.

Answer: The correct answer of the above question is Option D:It is a pointer to a value with no specific type, so it may be cast to point to any type.