A reaction attains equilibrium state under standard conditions, then:

Options

A. Equilibrium constant `K = 0`
B. Equilibrium constant `K =1`
C. `DeltaG^(Theta) = 0` and `DeltaH^(Theta) = T DeltaS^(Theta)`
D. `DeltaG = 0` and `DeltaH =T DeltaS`

Explanation

To solve the question regarding the equilibrium state of a reaction under standard conditions, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Gibbs Free Energy Equation**:
The Gibbs free energy change (ΔG) for a reaction can be expressed as:
\[
\Delta G = \Delta G^\circ + 2.303RT \log Q_c
...