How many Kilocalories do one gram of oil/fat provide?

Correct option is C

Fats and oils are energy-dense macronutrients that provide approximately 9 kilocalories (kcal) per gram.
This is more than double the energy provided by carbohydrates and proteins, which each provide 4 kcal per gram.
This high energy content is due to the long carbon chains in fatty acids, which release large amounts of energy upon oxidation.
Therefore, fats are the most concentrated source of dietary energy.
Options (a) and (b) are incorrect as 4 and 5 kcal/gram are values associated with carbohydrates and alcohol respectively.
Option (d), 10 kcal, is incorrect as it exceeds the scientifically established value.
Hence, the correct answer is Option (c) – Nine kilocalories per gram.