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What will be the output of the following C++ code?
#include <iostream>
#include <string>
using namespace std;
int main()
{
	cout<<extent<string[10][20][30], 0>::value;
	cout<<extent<string[10][20][30], 1>::value;
	cout<<extent<string[10][20][30], 2>::value;
	return 0;
}

A. 101010

B. 102030

C. 302010

D. 102010

Answer: Option B


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