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Which of the following is correct about extent() function?

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Which of the following is correct about extent() function?

(a) Returns how many elements are in array currently

(b) Returns the size of the 1st dimension

(c) Returns how many total elements can be stored in an array

(d) Returns the size of a given dimension

The question was posed to me in an interview for internship.

The question is from Array Type Manipulation in portion Class Hierarchies, Library & Containers of C++

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Best answer
The correct choice is (d) Returns the size of a given dimension

Best explanation: The extent() function takes two parameters one denoting the array other showing the dimension for which the size we want to know.

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