Which of the following is not a unit of heat?

Among the options provided; option [D] Degree Celsius is not a unit of heat. Instead, it is a unit of temperature measurement on the Celsius scale. Calorie (option [A]), Kilocalorie (option [B]), and Joule (option [C]) are all units used to quantify heat or energy. They represent different scales for measuring the amount of heat or energy transferred. Calorie and Kilocalorie are commonly used in the context of food and nutrition to measure the energy content of food, while Joule is the SI unit of energy and is commonly used in scientific and engineering applications to measure heat, work, and energy transfer. Understanding the distinction between temperature and heat is crucial in various fields, including thermodynamics, physics, and engineering.