Explanation

The phrase "hit someone on something"

Indicates that the action of hitting is directed at a specific part of the body or object.

In this case, "the bad touch" is considered as the target of the hitting action.

"On" is the preposition that denotes contact with something. 

Explanation

 You must comply with the teacher’s advice.

آپ کو استاد کے مشورے پر عمل کرنا چاہیے۔

The correct preposition after "comply" is "with".

 It's used in contexts where you are required to abide by a rule, instruction, or request.

Explanation

The accused was released on bail.

"On" is often used to indicate a condition or basis for something.

So, when someone is released on bail, it means:

The person’s release is contingent upon the grant of bail.

It’s similar to other phrases like:

• on leave (چھٹی پر)
• on probation (نگرانی پر)

Explanation

The correct structure is "prevent someone from doing something."

So, "He prevented me from going there" is the correct sentence.

Explanation

Generally prefer is followed by To.

To is a preposition here.

Prefer means ترجیع دینا

I prefer tea to coffee.