Step 1: Concept
Calories are a unit of energy. Different macronutrients (carbohydrates, proteins, fats) provide different amounts of calories per gram:
Carbohydrates typically provide 4 kcal/g.
Proteins also typically provide 4 kcal/g.
Fats provide approximately 9 kcal/g.
Step 2: Meaning
The question requires matching each substance in List - I with its corresponding caloric value from List - II. The correct values are:
Carbohydrates: 4.1 kcal/gram
Proteins: 4.1 kcal/gram
Fats: 9.3 kcal/gram
One calorie: 5.6 kcal (since 1 calorie = 4.184 joules, and 1 kcal = 1000 calories)
Step 3: Analysis
Let's analyze the options:
Option A suggests A-II, B-III, C-I, D-IV.
- Carbohydrates should be I, not II (4.1 kcal/gram).
- Proteins should be I, not III (4.1 kcal/gram).
- Fats are correctly matched with III (9.3 kcal/gram).
- One calorie is incorrectly matched with IV (5.6 kcal).
Option B suggests A-I, B-IV, C-II, D-III.
- Carbohydrates and proteins are both correctly matched with I (4.1 kcal/gram), but fats should be III.
- One calorie is incorrectly matched with IV.
Option C suggests A-III, B-I, C-II, D-IV.
- Fats are correctly matched with III (9.3 kcal/gram).
- Carbohydrates and proteins are both correctly matched with I (4.1 kcal/gram), but one calorie should be IV.
- One calorie is incorrectly matched with IV.
Option D suggests A-IV, B-III, C-I, D-II.
- Carbohydrates and proteins are both incorrectly matched with IV (5.6 kcal).
- Fats are correctly matched with III (9.3 kcal/gram), but one calorie should be IV.
- One calorie is incorrectly matched with II.
Step 4: Conclusion
Option C matches the correct caloric values for each substance in List - I, except for one calorie which should be IV instead of II.
Final Answer: (C)