A : Developments is the emergence of a multicellular organism from a single group of cells
R : Development involves growth differentiation and morphogenesis.
(a) If both Assertion & Reason are true and the reason is the correct explanation of the assertion then mark a
(b) If both Assertion & Reason are true but the reason is not the correct explanation of the assertion then mark b
(c) If Assertion is true statement but Reason is false then mark c
(d) If both Assertion and Reason are false statement then mark d

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion then mark (1)
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion then mark (2)
C. If Assertion is true statement but Reason is false then mark (3)
D. If both Assertion and Reason are false statement then Mark (4)

Answer

To solve the question regarding the Assertion (A) and Reason (R), we can follow these steps:

### Step 1: Analyze the Assertion
- The assertion states: "Development is the emergence of a multicellular organism from a single group of cells."
- This statement is true because development indeed refers to the process through which a single fertilized egg (a single cell) undergoes divisions and differentiations to form a multicellular organism.

### Step 2: Analyze the Reason
- The reason states: "Development involves growth, differentiation, and morphogenesis."
- This statement is also true. Development does involve these processes:
- **Growth**: Increase in size and mass.
- **Differentiation**: The process by which cells become specialized in structure and function.
- **Morphogenesis**: The biological process that causes an organism to develop its shape.

### Step 3: Determine the Relationship Between Assertion and Reason
- While both statements are true, we need to assess whether the reason explains the assertion.
- The reason describes the processes involved in development but does not specifically explain why development is the emergence of a multicellular organism from a single cell.

### Conclusion
- Since both the assertion and reason are true, but the reason does not serve as the correct explanation for the assertion, the correct answer is (b): "If both Assertion & Reason are true but the reason is not the correct explanation of the assertion then mark b."

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