NIT

Hello Abhijeet,
The IITs and NITs do not provide lateral entry admissions. So, that you cannot get admission the second year by direct admission.
If you clear JEE main also, you will be eligible for the 4 years B.Tech only. You need to discontinue the institute and join an NIT.

Hi,
Kindly check its reviews here:
https://www.shiksha.com/college/dr-b-r-ambedkar-national-institute-of-technology-jalandhar-24247

Yes, the CSE placements for NIT trichy is good, for further details check the link below:
https://www.shiksha.com/university/national-institute-of-technology-tiruchirappalli-2996

Pradeep,
There will be no problem in admission in NITs. If you drop for JEE, but if you are getting B.Sc. in DU or any other prestigious universities (specially govt.) then you should choose between B.Sc and dropping wisely. Please ask yourself a question that whether you are confidence about dropping or not and is it you who wants to an engineer or everybody else except you. Ask these two questions before dropping.
If you are confident enough then dropping is the best option for you.

Hello Ritesh,
You may use the JEE main college predictor given below for knowing the colleges that you can get:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
For previous year stats, refer:
http://josaa.nic.in/Result2016/result/OpeningClosingRank.aspx
You may consider the previous year stats as accurate, as they vary every year. You can get NIT Hamirpur, Jamshedpur, Agartala, Mizoram, etc.

Hello Ritesh,
As per your rank, you will not get cse at top nit's,however check here to know more:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

You should look for other colleges as your chances are very slim.

If you want NIT. score around 300+.