Question

Deficiency of vitamin $B_{12}$ causes

• A. Cheilosis
• B. Thalassemia
• C. Beri-beri
• D. Pernicious anaemia

Answer 1

Answer: (D)

Pernicious anaemia

Vitamin $B_{12}$ is also known as cyanocobalamin and cobalamin. It is reported in Spirulina (an alga). It can be obtained from animal source also such as from liver, meat, fish, eggs, milk. Its main function is the production of RBCs. Deficiency of vitamin $B_{12}$ can cause pernicious anaemia. In this disease, there is reduced production of RBCs in bone marrow. Deficiency of vitamin $B_{12}$ also causes demyelination of nerve fibres and glossitis

So, the correct answer is 'Pernicious anaemia'