Assertion : Cell wall of Chrysophytes are indestructible.
Reason : Cell walls of Chrysophytes have layer of magnesium pectate embedded in it.

Options

A. If both assertion and reason and true and reason is the correct explanation of assertion.
B. If both assertion and reason and true and reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Explanation

To analyze the assertion and reason provided in the question, we can break it down step by step:

### Step 1: Understand the Assertion
- The assertion states that "Cell wall of Chrysophytes are indestructible."
- Chrysophytes are a group of algae, and their cell walls are indeed known for being robust due to their composition.

### Step 2: Evaluate the Reason
- The reason states that "Cell walls of Chrysophytes have a layer of magnesium pectate embedded in it."
- While chrysophytes do have cell walls, the primary components are cellulose and silica, not magnesium pectate. Therefore, this reason is incorrect.

### Step 3: Determine the Truth Value of Both Statements
- Since the assertion is true (the cell walls are indeed indestructible), but the reason is false (the composition described is incorrect), we can conclude that:
- Assertion: True
- Reason: False

### Step 4: Choose the Correct Option
- Based on the truth values, the correct option is:
- "If the assertion is true, the reason is false." This corresponds to option C.

### Final Answer
- The correct answer is option C: "If the assertion is true, the reason is false."

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