What will be the output for the below code snippet:

vector <int> vec = {1, 2, 3, 4, 5, 6};  // line 1
cout << vec.front() + 1 << \" \" << vec.back() + 1; 

(A) 1 6
(B) 2 7
(C) 2 6
(D) error in vector declaration in line 1


Answer: (B)

Explanation: line 1 is also one of the way of declaring vectors so there is no error in that. front() and back() are the reference to the first and last element of the vector.