Confusion regarding question came in my today's exam

Question

G(d) was determined to be $3d+c$, here c is :

1. Constant of differentiation

2.Constant of anti differentiation

3.constant of integartion

4.constant of death and taxes

I chose option 3. But i am confused between option 3 and 2. Is this question even right?

Thanks

Answer 1

$$G(d) = 3d + c$$

Hence

$$G'(d) = 3$$

Which means that $c$ can be, in this case, a constant of integration.

To me it's ok.

The "anti differentiation" is the process to get the anti derivative, so it's ok number $3$ to me.