Defective hemoglobin in the blood is seen in which of the following?
- ASickle cell anemia
- BHematoma
- CHemophilia
- DMore than one of the above
- ENone of the above
Show answer and explanation
Correct answer: (a) Sickle cell anemia
Explanation
In sickle cell anaemia, a gene mutation makes abnormal haemoglobin (HbS). The red cells become sickle-shaped, carry less oxygen and can block small blood vessels.
Haemophilia is a clotting disorder, and a haematoma is a collection of blood outside the vessels (a bruise).