JEE

Which university is better depends upon the prospect of university/college that you are looking forward to like the curriculum and study, recruitment and placement rate and campus infrastructure and life. It would be a good choice to opt for Lovely Professional University as in the present scenario

Based on the JEE Advanced rank, you can get the following options if you belong to general category.
1. IIT Jodhpur (Bio Engineering)
2. IIT Palakkad (Civil)
3. IIT Dharwad (Mech)
4. IIT Roorkee (Civil)
5. IIT Jammu (CSE)
Based on the JEE Main rank, you can get the following options if belongs to general

JEE Main counselling is conducted in seven rounds in which all India categories wise ranks are considered for allotment. While there are also two special rounds of counselling held after the completion of first seven rounds of counselling. The special round of counselling considered the all India CR

Yes, your son can get CSE. Please tryout the following Colleges of Bangalore.
1. Christ University
2. HKBK College of Engineering
3. K. S INSTITUTE OF TECHNOLOGY, BENGALURU
4. CMR Institute of Technology
5. Reva University
6. MVJ College of Engineering, Bangalore.