Read the assertion and reason carefully to mark the correct option out of the option given below:
Assertion: Thick layers of muscles are present in the wall of alimentary canal.
Reason: These muscles help in the mixing of food materials with the enzymes coming from different glands in the alimentary canal.

Options

A. Both (A) and (R ) are true and and the (R ) is correct explanation of the (A)
B. Both (A) and (R ) are true but the (R ) is not the correct explanation of the (A)
C. (A) is true statement but (R ) is false
D. Both (A) of (R ) are false.

Answer

To solve the assertion and reason question, we will analyze both the assertion and the reason step by step.

### Step 1: Analyze the Assertion
The assertion states: "Thick layers of muscles are present in the wall of the alimentary canal."
- **Explanation**: The alimentary canal, which includes the esophagus, stomach, and intestines, has thick muscular walls. These muscles are primarily smooth muscles that facilitate the movement of food through peristalsis (wave-like muscle contractions).

**Hint**: Consider the structure of the alimentary canal and the role of muscles in digestion.

### Step 2: Analyze the Reason
The reason states: "These muscles help in the mixing of food materials with the enzymes coming from different glands in the alimentary canal."
- **Explanation**: The thick layers of muscles in the alimentary canal not only help in moving food but also play a crucial role in mixing food with digestive enzymes. This mixing is essential for effective digestion and absorption of nutrients.

**Hint**: Think about how the physical movement of food aids in the chemical processes of digestion.

### Step 3: Determine the Relationship
Now we need to determine if the reason is a correct explanation of the assertion.
- Both the assertion and reason are true statements. The assertion correctly describes the presence of thick muscle layers, and the reason accurately explains their function in mixing food with enzymes.

**Hint**: Reflect on whether the reason logically supports the assertion.

### Step 4: Choose the Correct Option
Based on the analysis:
- Both the assertion and reason are true, and the reason is indeed the correct explanation of the assertion.

**Final Answer**: The correct option is that both assertion and reason are correct, and the reason is the correct explanation of the assertion.

### Summary of Steps:
1. Analyze the assertion about muscle layers in the alimentary canal.
2. Analyze the reason regarding the function of these muscles.
3. Determine the relationship between the assertion and reason.
4. Choose the correct option based on the analysis.