Among the oxides, `Mn_(2)O_(7)(I), V_(2)O_(3) (II), V_(2)O_(5) (III),CrO(IV)` and `Cr_(2)O_(3)(V)`, the basic oxides are

Options

A. I and II
B. II and III
C. III and IV
D. II and IV

Explanation

To determine which of the given oxides are basic, we need to analyze the nature of each oxide based on the oxidation states of the metals involved and the number of oxygen atoms present.

### Step-by-Step Solution:

1. **Identify the Oxidation States:**
- For `Mn2O7`: Manganese (Mn) has an oxidation state of +7.
- For `V2O3`: Vanadium (V) has an oxidation state of +3.
- For `V2O5`: Vanadium (V) has an oxidation state of +5.
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