This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
[{'content': 'Kala azar is spread by - \nSelect and explain. \nA. House fly, B. Black fly, C. Sand fly, D. Tse tse fly', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Kala azar or visceral leishmaniasis is a protozoal disease.It is transmited from person to person by bite of female Phlebotomus argentipus.Transmission also occurs by contamination of bite wound or by crushing the insect during act of feeding.it may transmit by blood transfusion also. C/f : fever,splenomegaly,hepatomegaly along with anemia and weight loss.Darkening of the skin of face,hands,feet,and abdomen. Parks textbook of preventive and social medicine.K Park. Edition 23. page no:305,306', 'role': 'assistant'}]