Hello, I have some problem...

Example, I have questions :
1.
a. Do you have a car ? ( ) Yes ( ) No ( ) Not Answer
b. If Yes, Do you want to sell your car if your car is damaged ? ( ) Yes ( ) No

If I choose 1a, YES, then question 1b will appear, otherwise, it will dissapear (like hidden ...)

Is there any sollutions...(Because there are some people which choose 1a, No and Answer 1b too, if i don't handle this problem)?

Thank you for your answers...