This question consists of two statements each: assertion (A) and reason (R). To answer this question, mark the correct alternative as directed below.
Assertion: Cerebellum is large, lobed and convoluted in active animals, Reason: Cerebellum co-ordinates voluntary movements and helps maintain posture and equilibrium.

Options

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

Explanation

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**: The assertion states that "Cerebellum is large, lobed, and convoluted in active animals."
- The cerebellum is indeed a significant part of the brain, particularly in animals that are active. Its structure is adapted to support its functions.

2. **Understanding the Reason (R)**: The reason states that "Cerebellum coordinates voluntary movements and helps maintain posture and equilibrium."
- The cerebellum plays a crucial role in motor control. It is responsible for coordinating voluntary movements and maintaining balance and posture.

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