For which vitamin liver is not the source?
A.Vitamin $B_2$
B.Vitamin $B_1$
C.Vitamin $B_{12}$
D.Vitamin H

Hint: We need to understand the various types of vitamins mentioned in the question. We look into details about which vitamin liver is not the source. We should know about the properties of vitamins to get the direct answer.

Complete step by step answer:
Vitamin $B_2$ - Riboflavin, additionally referred to as diet $B_2$ , is a nutrition located in meals and used as a dietary supplement. It is required by the frame for cell breathing. Food resources include eggs, green vegetables, milk and other dairy products, meat, mushrooms, and almonds. Some nations require its addition to grains. Riboflavin deficiency (also called ariboflavinosis) results in stomatitis along with painful pink tongue with sore throat, chapped and fissured lips, and infection of the corners of the mouth (angular stomatitis).
Vitamin $B_1$ - Thiamine, additionally known as thiamin or diet B₁, is a vitamin determined in meals, and synthetic as a nutritional supplement and medication. Food sources of thiamine include entire grains, legumes, and some meats and fish. Thiamine is commonly properly tolerated and non-poisonous whilst administered orally. Rarely, damaging side outcomes were stated when thiamine is given intravenously including allergies, nausea, lethargy, and impaired coordination.
Vitamin $B_{12}$ - Vitamin $B_{12}$ , also referred to as cobalamin, is a water-soluble nutrition worried in the metabolism of each mobile of the human body. It is a cofactor in DNA synthesis, and in both fatty acid and amino acid metabolism. It is particularly crucial in the regular functioning of the worried device through its position within the synthesis of myelin, and in the maturation of developing red blood cells in the bone marrow. Vitamin $B_{12}$ is the biggest and most structurally complex vitamin.
Vitamin H- Biotin additionally referred to as nutrition H, vitamin B₇ or vitamin B₈ is a water-soluble B nutrition. It is concerned in a wide variety of metabolic tactics, both in humans and in other organisms, broadly speaking related to the usage of fat, carbohydrates, and amino acids.
Hence option B is the correct one.

Additional Information:
There may be oily scaly pores and skin rashes at the scrotum, vulva, philtrum of the lip, or the nasolabial folds. The eyes can end up itchy, watery, bloodshot and touchy to mild. Due to interference with iron absorption, even moderate to slight riboflavin deficiency consequences in an anemia with everyday mobile size and everyday hemoglobin content.
Most omnivorous humans in advanced international locations reap enough nutrition $B_{12}$ from ingesting animal-sourced meals, together with meat, fish, fowl, milk and eggs. Its deficiency can doubtlessly cause excessive and irreversible harm, especially to the brain and apprehensive gadget. At degrees only barely decrease every day, a number of signs and symptoms such as fatigue, lethargy, difficulty on foot (wonderful stability troubles), melancholy, poor memory, breathlessness, headaches, and faded skin, amongst others, can be skilled specially in people over age 60. Vitamin $B_{12}$ deficiency also can be a sign of mania and psychosis.

Note:
Biotin deficiency may be caused by inadequate dietary consumption or inheritance of one or more inborn genetic issues that affect biotin metabolism. Subclinical deficiency can cause moderate symptoms, along with hair thinning, brittle fingernails, or pores and skin rash, generally at the face.