hello arun kumar,

surely i can tell you. but i suggest you to refer this link by copy it and paste in the address bar of your browser where you can have important topics and tips for jee mains 2019:

https://engineering.careers360.com/articles/jee-main-2019

all the best!

I Hope this information will be useful to you.

if you need additional information,let us know to help you.

Thank you!!!:)