Colleges in Dehradun

Sorry for late reply. It has already out now. I hope you got message from UPES regarding to your result. And, counseling is going to start from 31 May.

You can directly ask to them. You can call them. They will better explain you about this. I don't have much idea about this.

Because many students get ranked low and don't come to UPES counselling. Also, many of those who get good rank don't come to counselling too.
So this time, when you will go for counselling, then they will tell your rank on the spot. So there will be more possibilities for getting a branch of your choice.

You should go for your interest because it is you who is going to do engineering. But placements of petroleum are quite good in comparison to CSE.
But it is a waste if you are not enjoying what you are doing.

I will prefer UPES.
I didn't give the exam for IPU. I preferred UPES over IPU because placements are very good in UPES in comparison to IPU (in my knowledge).

I don't have much idea about LAW in Amity Noida. But in UPES study pattern is quite good. I can't say much about the placements. Some students get good placements some go to reputated law firm with low packages.

Among these colleges I will prefer UPES for you in terms of placements and study. You can check placements on their official websites.

I will prefer IPES. It placements are good as comparison to others. And study is also well mannered.

I don't have any idea about IPU.
If your son has 112 marks in JEE having general category, then he might not get any good NITs easily.
He can go for other private colleges.

Counselling is starting from 31 may. So there are very less chances that you will get petroleum branch. There are only 20-25% chances for getting petroleum engineering. But you can try for it.