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If the definition is given in the header file that we include then ________________

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If the definition is given in the header file that we include then ________________

(a) The program can run successfully

(b) Also the program should define the extern variable

(c) The extern variable must contain two definitions

(d) Extern variable can’t be used in the program

The question was asked by my school teacher while I was bunking the class.

This question is from Extern Variable topic in chapter Memory Allocation & Scope of Variable of Object Oriented Programming

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The correct option is (a) The program can run successfully

To explain I would say: The program runs successfully. This is because only one definition of any variable is allowed. And hence the definition from the source file that is included will be used.

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