The least reactive metal among the following is

Options

A. magnesium
B. lead
C. silver
D. sodium.

Explanation

To determine the least reactive metal among the given options, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Metals**: First, we need to identify the metals provided in the question. Let's assume the options are Sodium, Magnesium, Lead, and Silver.

2. **Understand Reactivity Series**: The reactivity series is a list of metals arranged in order of decreasing reactivity. The higher a metal is in the series, the more reactive it is.

3. **List the Metals in Order of Reactivity**:
- Sodium (Na) - Most reactive
- Magnesium (Mg) - Less reactive than Sodium
- Lead (Pb) - Less reactive than Magnesium
- Silver (Ag) - Least reactive among the listed metals

4. **Determine the Least Reactive Metal**: From the reactivity series, we can see that Silver is the least reactive metal compared to Sodium, Magnesium, and Lead.

5. **Conclusion**: Therefore, the least reactive metal among the given options is **Silver**.