Question

This lacks in patients with haemophilia A
A. X chromosome
B. Calcium
C. Antihemophilic factor
D. Plasma thromboplastin

Answer 1

Hint:
The F8 gene in humans encodes factor VIII. Hemophilia A, a recessive X-linked coagulation condition, is caused by errors in this gene. Blood contains proteins called coagulation factors. During an injury, they assist in creating blood clots to stop the bleeding. Clotting factors are another name for these proteins. The human body contains a variety of clotting components, all of which are crucial for forming blood clots.

Complete answer:
Low clotting factors are used to categorise different types of congenital haemophilia. Haemophilia A is the most prevalent kind and is linked to low levels of factor 8. Hemophilia B, the second most typical kind, is linked to a low level of factor 9.
The quantity of factors in a person's blood determines the severity of their haemophilia. The likelihood of bleeding, which can cause major health issues, increases as the amount of the component decreases.
So, antihemophilic factors lacks in patients with haemophilia A.

Option ‘C’ is correct

Note:
Blood platelets and specific proteins known as clotting factors work together to produce a clot during the clotting process. The clot stops the bleeding and safeguards the body as it recovers. Some clotting factors are present in reduced amounts in haemophiliacs.
Profuse and unexplained bleeding from wounds or cuts, especially following surgery or dental procedures. numerous severe or deep bruises. Unusual bleeding following immunizations. joint discomfort, edema, or stiffness