Decision makking using else if statement

In C language Write a program to generate a patient bill according to the following rules:Display a discount menu and ask the user to choose the discount offer best suited for him or her.1.Senior citizens -10%flat discount on total bill.2.Economically backward -15% discount for annual income is less than 3 lpa.3.Not eligible for any discount.Verify the eligibility of the user based on the age and annual income.Display the patient summary as a form