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

Identify the error, if any, in the statement:long sum = m1 + m2;

1. Initialization at the time of declaration is not valid
2. Declaration cannot contain any expression
3. Type specification is incomplete
4. No error

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Answer: 

Option a: Initialization at the time of declaration is not valid

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Explanation Here