Assertion :- In plasma membrane non polar tails of fatty acids is protected from the aqueous environment.
Reason:- Lipids are arranged within the membrane with their polar head towards outerside and the hydrophobic tail towards inner part.

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 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

To solve the question, we need to analyze the assertion and the reason provided.

### Step 1: Understand the Assertion
The assertion states that "In plasma membrane, non-polar tails of fatty acids are protected from the aqueous environment." This means that the structure of the plasma membrane ensures that the hydrophobic (non-polar) parts of the lipids are shielded from water.

**Hint:** Think about the nature of water and how non-polar substances behave in its presence.

### Step 2: Understand the Reason
The reason states that "Lipids are arranged within the membrane with their polar head towards the outer side and the hydrophobic tail towards the inner part." This describes the arrangement of phospholipids in the plasma membrane, where the hydrophilic (polar) heads face the aqueous environment (both inside and outside the cell), while the hydrophobic (non-polar) tails face each other, away from the water.

**Hint:** Visualize the structure of the phospholipid bilayer to see how the heads and tails are oriented.

### Step 3: Analyze the Relationship Between Assertion and Reason
Now, we need to determine if the reason correctly explains the assertion. Since the arrangement of lipids with polar heads facing outward and hydrophobic tails facing inward does indeed protect the non-polar tails from the aqueous environment, the reason provides a correct explanation for the assertion.

**Hint:** Consider how the arrangement of molecules can influence their interaction with water.

### Step 4: Conclusion
Both the assertion and the reason are true, and the reason correctly explains the assertion. Therefore, the correct answer is that both the assertion and reason are true, and the reason is the correct explanation of the assertion.

**Final Answer:** Option 1: Both assertion and reason are true, and the reason is the correct explanation of the assertion.