The daily dietary requirement of Vitamin $B_{12}$ by an adult is

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Question 1 of 5

The daily dietary requirement of Vitamin $B_{12}$ by an adult is

A. 1-3 $\mu \mathrm{g}$ B. 50-100 $\mu \mathrm{g}$ C. 0.1-0.5 $\mu \mathrm{g}$ D. 1-3 $\mu \mathrm{g}$

Correct Answer: A

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 2 of 5

Hydroxocobalamine differs from cyanocobalamine in that

A. It is more protein bound and better retained B. It is beneficial in tobacco amblyopia C. It benefits haematological but not neurological manifestations of Vit $B_{12}$ deficiency D. Both (a) and (b)

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 3 of 5

Megaloblastic anemia is caused by deficiency of

A. Iron B. Vitamin $B_{12}$ C. Vitamin C D. All of the above

Correct Answer: B

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 4 of 5

Vitamin B12 is a required co-factor for the following reaction

A. Conversion of methylmalonyl-CoA to succinylCoA B. Conversion of $5-\mathrm{CH}_3-\mathrm{H}_4$-folate to $\mathrm{H}_4$-folate C. Conversion of homocysteine to methionine D. All of the above

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 5 of 5

Vitamin K is indicated for the treatment of bleeding occurring in patients

A. Being treated with heparin B. Being treated with streptokinase C. Of obstructive jaundice D. Of peptic ulcer

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

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