Which of the metals react with dilute Nitric acid and evolve hydrogen gas?
(I)P (II) Mg(III)Mn(IV)ZN

Options

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

Explanation

To determine which metals react with dilute nitric acid (HNO3) and evolve hydrogen gas, we need to analyze the behavior of each metal listed in the question.

### Step-by-Step Solution:

1. **Understand the Reaction with Dilute Nitric Acid**:
- Generally, metals react with acids to produce hydrogen gas. However, nitric acid is a strong oxidizing agent and usually does not release hydrogen gas when reacting with most metals.

2. **Identify the Metals**:
- The metals given in the question are:
- (I) P
- (II) Mg
- (III) Mn
- (IV) Zn

3. **Analyze Each Metal**:
- **Metal P**: We need to check if it is a reactive metal with dilute nitric acid. Without specific information, we cannot confirm its behavior.
- **Metal Mg (Magnesium)**: Magnesium is known to react with dilute nitric acid, and it can release hydrogen gas under certain conditions. So, Mg is a candidate.
- **Metal Mn (Manganese)**: Manganese is an exception. It can also react with dilute nitric acid and evolve hydrogen gas.
- **Metal Zn (Zinc)**: Zinc typically reacts with dilute nitric acid, but it usually does not produce hydrogen gas due to the oxidizing nature of nitric acid.

4. **Conclusion**:
- From the analysis, the metals that react with dilute nitric acid and evolve hydrogen gas are:
- (II) Mg
- (III) Mn

### Final Answer:
The metals that react with dilute nitric acid and evolve hydrogen gas are **(II) Mg and (III) Mn**.