Select odd one out which does not fit as required and justify your answer
H, Li, Na, K` " "` Metallic nature

Explanation

To solve the question of identifying the odd one out among H (Hydrogen), Li (Lithium), Na (Sodium), and K (Potassium) based on metallic nature, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Metallic Nature**:
- Metallic nature refers to the ability of an element to lose electrons easily. Metals tend to have one or more electrons in their outer shell that they can lose to form positive ions.

2. **List the Elements**:
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