Assertion :- According to Hugo de Vries , it is mutation which causes speciation and hence called it saltation.
Reason :- Mutations are random and diretional.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is a not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are false.

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion:**
- The assertion states that according to Hugo de Vries, mutations cause speciation and this phenomenon is referred to as "saltation."
- Hugo de Vries is known for proposing the mutation theory of evolution, which suggests that mutations can lead to the formation of new species.

2. **Evaluating the Reason:**
- The reason provided is that mutations are random and directional.
- It is important to note that while mutations are indeed random, they are not directional. They occur without a specific direction or purpose.

3. **Analyzing the Truth of the Statements:**
- The assertion is true because Hugo de Vries did propose that mutations can lead to speciation (saltation).
- The reason is false because mutations are random but not directional; they do not follow a specific path or direction.

4. **Conclusion:**
- Since the assertion is true and the reason is false, the correct answer is that the assertion is true, but the reason is false.

**Final Answer:**
- Assertion is true, Reason is false.

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