How are physics, astronomy and chemistry connected?
A. Each discipline uses principles from the others.
B. They are not connected; they are separate fields of study.
C. Chemistry and physics are connected while astronomy relies on completely separate principles.

Question

How are physics, astronomy and chemistry connected?
A. Each discipline uses principles from the others.
B. They are not connected; they are separate fields of study.
C. Chemistry and physics are connected while astronomy relies on completely separate principles.

anonymous · Answer

I'd say A.
Physics is typically involved in every field of science so you can't exclude it.

anonymous · Answer

They are all one and the same "Science", the difference is only in the way we explain an event like the terminologies, techniques, field and depth of view, etc.

So, B and C could not be the right answer. It should be A.