Question

Tooth extraction in a haemophilic person may cause death due to excessive bleeding because of ____________.

• A. Absence of plasma factor required to convert prothrombin into thrombin
• B. Presence of plasma factor that causes haemorrhage
• C. Presence of plasma factor that prevents blood clotting
• D. Absence of plasma factor required for haemorrhage

Answer 1

The correct option is A Absence of plasma factor required to convert prothrombin into thrombin

There are two type of haemophilia, haemophilia A and haemophilia B. Haemophilia A is caused due to the absence of plasma factor VIII and haemophilia B is caused due to the absence of plasma factor IX. These plasma factors are essential for the coagulation of blood as they play a vital role in the conversion of prothrombin into thrombin. Hence, tooth extraction in a haemophilic person may cause death due to excessive bleeding as there is no plasma factor in his/her body for the coagulation of blood.

So the correct answer is "Absence of plasma factor required to convert prothrombin into thrombin".