instinct for/in and right/proper thing?

[Linh Bui Hoang]

And his (1) _____________ were always in the visual arts - that was his main area of interest and obviously the (2) _____________ thing for him.
1. A. feelings B. insights C. senses D. instincts
2. A. precise B. right C. straight D. proper

What would you choose to fill in those blanks?
I would choose D for 1 and B for 2.
But I wonder whether it should be "his instincts were always for the visual arts" or "his instincts were in the visual arts".
As to blank 2, my teacher says that the answer is "proper" but I often see "the right thing" instead.

[Jamie (K)]

"Instincts in" is correct in that sentence, because he had instincts for various things in the field of visual arts. However, I don't like any of the choices given for (1).

The answer to (2) could be "right" or "proper", but since we have no context, it is impossible to tell which word would be better. My instinct is that a native speaker would put "right" in that blank.