a) Glucose is the simplest form of sugar which can be easily metabolized by the living cells through the process of cellular respiration to generate ATP. So, they act as an instant source of energy. One molecule of glucose produces 38 ATP during the process of cellular respiration.
b) Proteins help to repair the damaged cells of the body. It takes longer during to break down and form energy. It breaks into an amino acid, glycine and finally to acetyl CoA which enters TCA cycle for energy production.
C) Vitamin C helps in the growth and development. It provides protection against immune system deficiencies, cardiovascular disease, prenatal health problems, eye disease, and even skin wrinkling.
d) Sucrose is a complex form of carbohydrate which needs to be converted into a simple form like glucose and then it is converted to energy.
So, the correct answer is 'Glucose'