Which of the following is true for the speical having `3d^(4)` configuration ?

Options

A. `Cr^(2+)` is reducing in nature.
B. `Mn^(3+)` is oxidising in nature.
C. Both (A) and (B)
D. None of those

Explanation

To determine which statements are true regarding the species with a `3d^4` configuration, we need to analyze the electronic configurations and oxidation states of chromium (Cr) and manganese (Mn).

### Step-by-Step Solution:

1. **Identify the Element with 3d^4 Configuration**:
- The species with a `3d^4` configuration corresponds to the chromium ion (Cr²⁺). Chromium has an atomic number of 24, and its ground state electronic configuration is:
\[
\text{Cr: } [Ar] 3d^5 4s^1
...