Is there any one who ranked below air 100 in just 6 months of preparation for jee

Hello student there's no actual data about preparation timing of toppers but as per their suggestions it's expected that anyone who have a good command over syllabus and doing practice consistently then they can get good rank for sure.

Prefer NCERT to build your basic concept and make sure you do each and every example and exercise questions of Ncert before jumping to a reference book after completing ncert thoroughly refer to your coaching material or any reference book as mentioned below -

CONCEPT OF PHYSICS BY HC VERMA

OP TONDON CHEMISTRY

JD Lee chemistry

DC Pandey physics

Arihant practice book

You can also subscribe to careers360 knockout package for preparing and qualifying the entrance examination it offers you 100 percent money back guarantee if you do not qualify..

Refer to the link mentioned below - https://learn.careers360.com/knockout-jee-main-april/

Feel free to comment if you have any doubt

Good luck