A thirty four year old female presents with a deep vein
thrombosis. She has a history of weight loss, recurrent mouth ulcers and chronic
diarrhoea with the passage of a bulky stool, which is difficult to flush away.
She has a macrocytic anaemia.
The underlying biochemical abnormality that would
explain the DVT would be:
Vitamin B 12 deficiency
Folic acid deficiency
Protein S deficiency
e) Protein C deficiency