Assertion : Carbohydrates are called richest source of energy.
Reason : Carbohydrates provide highest amount of energy on oxidation.

Options

A. If both Assertion and Reason are true and Reason is correct explanation of Assertion.
B. If both Assertion and Reason are true but Reason is not correct explanation of Assertion.
C. If Assertion is true but Reason is false.
D. If both Assertion and Reason are false.

Answer

To analyze the assertion and reason provided in the question, we will follow these steps:

### Step 1: Understand the Assertion
The assertion states that "Carbohydrates are called the richest source of energy." We need to evaluate if this statement is true or false.

### Step 2: Evaluate the Assertion
Carbohydrates are indeed a significant source of energy for the body, but they are not the richest source. The richest source of energy is actually fats (lipids), which provide more energy per gram than carbohydrates. Therefore, the assertion is **false**.

### Step 3: Understand the Reason
The reason states that "Carbohydrates provide the highest amount of energy on oxidation." We need to evaluate if this statement is true or false.

### Step 4: Evaluate the Reason
When carbohydrates are oxidized, they do provide energy, but they do not provide the highest amount of energy compared to fats. Fats yield approximately 9 calories per gram upon oxidation, while carbohydrates yield about 4 calories per gram. Therefore, the reason is also **false**.

### Step 5: Conclusion
Since both the assertion and the reason are false, we conclude that the correct option is that both are false.

### Final Answer
The correct option is: **Both assertion and reason are false.**

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