Are R3, R1, R2, and the capacitor in parallel?

[Scholar1]

Homework Statement

Please see under attempt at a solution for my question.

Homework Equations

V=IR
V=Q/C

The Attempt at a Solution

This was a conceptual question about currents I got it correct. Just for my knowledge I was wondering if R3,R1,R2, and the capacitor were all in parallel. I know R1,R2, and the capacitor are definitely all in parallel but I wasn't sure if R3 also was?

 

[cnh1995]

I wasn't sure if R3 also was?

It isn't.

 

[Scholar1]

why>

 

[cnh1995]

What is the necessary condition for parallel components?