A balanced diet does not include
A. Carbohydrates and fats
B. Nucleic acid and enzymes.
C. Proteins and vitamins.
D. Minerals and salt.

Hint: The diet which involves several foods that can fulfill the requirements of the body to work effectively. The requirements involve proteins, minerals, vitamins, calories, etc. A balanced diet not only provides the required nutrients to the body but also stores some amount of additional nutrients in the body for future use.

Complete answer:
A balanced diet involves carbohydrates, proteins, fats, minerals, nutrients, salts. Enzymes and nucleic acids are those biomolecules that are synthesized by the body. These enzymes and nucleic acids need proper nutrition to synthesize into the body.
Benefits of a healthy diet are given below:
Our body needs nutrition to be active. A healthy diet provides a specific amount of nutrition to the body.
Due to the supply of measured nutrition, a healthy diet does not cause overweight.
Proper nutritional supply, makes the body immune system so strong that the possibility of being infected by viruses and bacteria become very less. Many other diseases Like cardiovascular disease or diabetes can be prevented by a healthy diet.
So, the correct answer is “Option B”.

Additional Information: To maintain healthy eating habits, some rules are needed to be followed. These involve taking food on time, breakfast taking is the must, drinking a lot of water, eating simple non-spicy proper cooked food, etc.

Note: Enzymes are those proteins that act as the catalytic component in the biological reaction. During the reaction, enzymes remain unchanged and convert the substrate into the product. The nucleic acid is responsible for carrying genetic information from one generation to another. There are two types of nucleic acids found in nature, named deoxyribonucleic acid, and ribonucleic acid. Both nucleic acid and enzymes are syntheses by the body, so there is no need to take these externally.