This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'All of the following are included in the pathogenesis of oedema except? \nSelect and explain. \nA. Decreased hydrostatic pressure of capillaries, B. Decreased plasma osmotic pressure of capillaries, C. lymphatic obstruction, D. Increased vascular permeability', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Pathogenesis of edema\n1) The increased hydrostatic pressure of capillaries\n2) Decreased plasma osmotic pressure of capillaries: It causes decrease\xa0in inward driving force. It results\xa0from Hypoproteinemia. When total plasma protein is below 5 gm/dl(A 113) (normal 6-8 gm/dl) or\xa0albumin is below 2-5 gm/dl (normal 3.5-5 gm/dl) edema takes place.\n3) Defective removal of interstitial fluid by lymphatics: It is due to lymphatic obstruction.\n4) Increased vascular permeability\n5) Sodium (salt) and water retention', 'role': 'assistant'}]