Given below is a C++ function to evaluate a postfix expression represented as a string. The below code contains proper comments and some statements are marked specially. Find the statements which will lead to incorrect output.// C++ function to evaluate a given postfix expressionint evaluatePostfix(char* exp){// Create a stack of capacity equal to expression sizestack<int> st;int i;// Scan all characters one by onefor (i = 0; exp[i]; ++i){// If the scanned character is an operand (number here),// push it to the stack.// The isdigit() function is used to check if a particular// character in the given input string is a digit or not.if (isdigit(exp[i]))st.push(exp[i]); // Statement 1// If the scanned character is an operator, pop two// elements from stack apply the operatorelse{int val1 = st.top(); // Statement 2st.pop();int val2 = st.top();st.pop();switch (exp[i]) // Statement 3{case '+': st.push(val2 + val1); break;case '-': st.push(val2 - val1); break;case '*': st.push(val2 * val1); break;case '/': st.push(val2/val1); break;}}}return st.top();}(A) Statement 2(B) Statement 1(C) Statement 3 & Statement 1(D) None of the above