Which college should my son opt as his score in JEE Mains is 100?

OJEE and JEE syllabus is somewhat same and different in some places. The OJEE syllabus for Physics, Chemistry and Mathematics is different from JEE. In JEE, the physics syllabus includes topics such as Mechanics, Thermodynamics, Optics, etc. These topics require knowledge of physics topics. 

JEE Main is conducted in two sessions, the first in January/February and the second in April. This helps students to appear in both papers if required and correct their scores. If you participate in both exam sessions, the system intelligently recognises your "Best of Two" scores and finalises your

DTU admissions are majorly based on the JEE Main scores. However, without JEE Mains, students will have to change the specialisations and the course opted for then only admission will be possible. 

While clearing JEE Main is a huge achievement, it's actually just the first hurdle for IITs. JEE Main acts as a qualifying test that allows the top 2.5 Lacs candidates to sit for JEE Advanced. To get into IIT Dharwad, your final seat allocation will be based strictly on your JEE Advanced rank. JEE M

Congratulations! After JEE Main, register for JEE Advanced, which is the only way to get into an IIT. This registration usually happens in late April or early May, with the exam itself scheduled for late May. This is a very tight window, so keep a close eye on the official portal right after your Ma