Which of the following options represents only the units of energy?

Correct option is A

The correct answer is: (a) Joule, Calorie, Kilowatt hour
Explanation:
· Joule (J) – SI unit of energy.
· Calorie – Non-SI unit of energy, used in food and nutrition (1 Calorie = 4.184 Joules).
· Kilowatt hour (kWh) – Commercial unit of energy used by electricity boards (1 kWh = 3.6 × 10⁶ J).
· These three represent energy units only.
· Newton is a unit of force, not energy.
Information Booster:
· Energy is the capacity to do work, measured in Joules (SI).
· Kilowatt hour is often used in electricity billing.
· Calorie is commonly used in measuring food energy.
· 1 kWh = 860 Calories (approx.).
· Newton = kg·m/s² (unit of force).
· Work = Force × Displacement; hence energy and force are related but are not the same unit.