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: Social & Preventive Medicine
[{'content': 'Most effective natural barrier to rabies \nSelect and explain. \nA. Heat, B. Humidity, C. Water, D. None', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Water Rabies is primarily a zoonotic disease of warm-blooded animals, paicularly carnivorous such as dogs, Cats, Jackals and wolves. It is transmitted to man usually by bites or licks of rabid animals. It is the communicable disease which is always fatal. Rabies is an enzootic and epizootic disease of world-wide impoance. Geographic boundries play an impoant role in the distribution of rabies. Water appears to be the most effective natural barriers to rabies - So, In India, Lakshadweep and Andman & Nicobar islands are free of the disease. A Rabies free area has been defined as one in which no case of indigenously acquired rabies has occurred in man or any animal species for 2 years. Countries where rabies is not found - Australia, china (Taiwan), Cyprus, Iceland, Ireland, Malta, Japan, Newzealand, Britain.", 'role': 'assistant'}]