He is a perfectionist, so he is very strict about his work.

He played a perfect fifth scale on the piano.

I am majoring in biophysics at university.

I am majoring in physical chemistry at university.

There was a spot on his shirt.

I have been to Ahmedabad.

He is majoring in linguistics.

He has a deep interest in astronomy.

Electromagnetism is a part of physics that studies the interaction between electricity and magnetism.

He is good at solving geometry problems.