I got 60% in mains from sc category which is the best college i can opt for mechanical engineering in near bhopal

Firsty with 60% I'm considering it is 60% marks not 60%ile.

With this score and considering your category, you can expect any NIT of your choice.

Now coming to the colleges

Firstly I'm glad that you are clear with your choices.

For best mechanical colleges

1. NIT Warangal

2. NIT Allahabad

3. NIT Trichy

4. NIT Jaipur

but since you have asked close to Bhopal, then there two possibilities

1. NIT Bhopal

2. NIT Allahabad

From these two choices in hand, I would recommend to prefer NIT Allahabad as it has far better Alma mater and resources.