C++ References Question: Which value we cannot assign to reference? a) integer b) floating c) unsigned d) null C++ References Interview QuestionAnswer: d) null Previous QuestionNext QuestionWhat is output of this program? #include <iostream> using namespace std; int main() { int a = 9; int & aref = a; a++; cout << "The value of a is " << aref; return 0; } a) 9 b) 10 c) error d) 11Identify the correct sentence regarding inequality between reference and pointer. a) we can not create the array of reference. b) we can create the Array of reference. c) we can use reference to reference. d) none of the mentioned