Fats and oils are the most preferred reserved foods. Choose the correct combination of statements given below to support this:
i. They have density lower than most other molecules in a cell
ii. Their complete oxidation release energy greater than other organic polymers.
iii. Being hydrophobic they get clustered and use lesser space for storage.
iv. Being heteropolymeric they are the most convenient storage foods.

Options

A. ii and iii
B. I and ii
C. I and iv
D. III and IV are correct.

Answer

To determine why fats and oils are the most preferred reserve foods, we need to analyze the given statements one by one and identify the correct combination that supports this assertion.

### Step-by-Step Solution:

1. **Evaluate Statement i**: "They have density lower than most other molecules in a cell."
- This statement is **not entirely accurate**. While fats and oils are less dense than water, their density relative to other cellular molecules varies. Thus, this statement does not strongly support the idea that fats and oils are preferred reserve foods.

2. **Evaluate Statement ii**: "Their complete oxidation releases energy greater than other organic polymers."
- This statement is **true**. Fats and oils, when oxidized, release more energy per gram compared to carbohydrates and proteins. This makes them efficient energy storage molecules.

3. **Evaluate Statement iii**: "Being hydrophobic they get clustered and use lesser space for storage."
- This statement is **true**. The hydrophobic nature of fats allows them to be stored compactly in cells, minimizing the space they occupy. This is an advantage for energy storage.

4. **Evaluate Statement iv**: "Being heteropolymeric they are the most convenient storage foods."
- This statement is **not correct**. Fats and oils are not heteropolymeric; they are primarily composed of triglycerides, which are not polymers in the same sense as proteins or nucleic acids.

### Conclusion:
Based on the evaluations:
- The correct statements that support the idea that fats and oils are preferred reserve foods are **ii** and **iii**.

### Final Answer:
The correct combination of statements supporting that fats and oils are the most preferred reserve foods is:
- **ii. Their complete oxidation releases energy greater than other organic polymers.**
- **iii. Being hydrophobic they get clustered and use lesser space for storage.**

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