Question

 Which of the following conditions causes erythroblastosis foetalis? [NEET (Oct.) 2020]

(a) Mother Rh+ve and foetus Rh-ve

(b) Mother Rh-ve and foetus $\mathrm{Rh}+\mathrm{ve}$

(c) Both mother and foetus $\mathrm{Rh}-\mathrm{ve}$

(d) Both mother and foetus $\mathrm{Rh}+\mathrm{ve}$

Answer/Explanation

Ans. (b)
If mother is Rh-ve and foetus is $\mathrm{Rh}+\mathrm{ve}$ then there can occur a condition called erythroblastosis foetalis. It is a special case of Rh incompatibility in which during the second pregnancy of $\mathrm{Rh}-$ ve mother carrying $R h+$ ve foetus, the $R h$ antibodies from mother $(R h-v e)$ can leak into the blood of the foetus (Rh $+$ ve) and destroy the foetal RBCs

Question

 Continuous bleeding from an injured part of body is due to deficiency of [CBSE AIPMT 2002]

(a) vitamin-A

(b) vitamin-B

(c) vitamin-K

(d) vitamin-E

Answer/Explanation

Ans. (c)

Vitamin- $K$ is required for clotting process, it is required for the formation of prothrombin in liver, the deficiency of which leads to severe bleeding disorders. Deficiency of vitamin-A causes night blindness, xerophthalmia, keratomalacia, retarded growth.
Deficiency of vitamin-B causes beri-beri disease. Deficiency of vitamin-E causes sterility.

Question

 The blood cancer is known as [CBSE AIPMT 1995]

(a) leukemia

(b) thrombosis

(c) haemolysis

(d) haemophilia

Answer/Explanation

Ans. (a)
Blood cancer is known as leukemia which is characterised by uncontrolled division of leukocytes.

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