C++ MQCs with Explanation (CHAPTER 3: TOKENS, EXPRESSIONS AND CONTRAL STRUCTURES)

Which of the following program segments is valid in C++ ?

1. void *p1;char*p2;p2=p1;
2. void *p1; int *p2; *p2 = *p1;
3. void *p1; char *p2; p2 = (char *) p1;
4. enum colour {red, blue}; colour background; background = 1;

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Answer: 

Option c: void *p1; char *p2; p2 = (char *) p1;

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Explanation Here