I think you want to start a Question2Answer website for student of class 9th and 10th in India. That's great idea. I mean, this has a great potential.
Here is what I would recommend for Domain:
- As the site is for India, consider a .in domain for better local SEO benefits and a feeling of Indian Domain.
- Try to use word EDU in your domain as this will be related to Education (9th and 10th).
I have searched various domain name. Here is one of my recommendation. I have kept it to use in future. But, this Domain will suit your Idea and Site more than mine one.
Also, I haven't registered it, I it available to register. I would recommend to buy from Hostinger (Rs. 430) as it has lower price than GoDaddy (Rs.499 + GST 18%).