Gibbs free engery help...?

Question

ΔGO’ refers to Gibbs Free energy change (J mol-1)

(The O' is meant to be raised above the G like a degree symbol)

1. under non-standard conditions

2. under standard conditions of 1 atmosphere and prevailing concentrations of substrate and product, each at 1M, and at any pH

3. as in B, but at pH 7.0

4. as in B, but at pH 1.0

5. None of the above.

Answer 1

I'm pretty sure it's choice 3.