Urea is a nitrogenous waste formed as a result of metabolism of various food in the body as excreated in urine.so not taking food or beverages will have less urea in urine .so option B is correct

Less urea

When a person is not taking food or beverages, their body enters a state of fasting. During fasting, the body goes through several metabolic changes to maintain energy levels and preserve vital functions. One of the changes that occur is the breakdown of proteins in the body to provide amino acids for energy.

Protein metabolism
Proteins are made up of amino acids, and the body needs a constant supply of amino acids for various functions. In the absence of dietary protein intake, the body starts breaking down its own proteins, such as muscle tissue, to release amino acids. This breakdown of proteins results in the release of ammonia, a toxic substance that is converted into urea in the liver.

Urea production and excretion
Urea is a waste product formed in the liver from ammonia and is excreted in urine through the kidneys. It is the main nitrogenous waste product in human urine and plays a vital role in maintaining nitrogen balance in the body. The production and excretion of urea are influenced by dietary protein intake.

Effect of fasting on urea levels
When a person is not taking food or beverages, the body's protein breakdown increases to provide amino acids for energy. As a result, the production of urea also increases. However, since there is no dietary protein intake, the overall amount of urea formed is reduced.

Conclusion
Therefore, when a person is not taking food or beverages, the urine will have less urea. This is because there is decreased dietary protein intake, leading to reduced overall urea production despite the increased breakdown of body proteins during fasting.