This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
A patient with tubercular pleural effusion falls under category of WHO grading of TB - 
Select and explain. 
A. I, B. II, C. III, D. IV
A: I
Answer: A: I 
Explanation: <p> Tubercular pleural effusion included in new extrapulmonary TB . So it is category 1. Reference:Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:188. <\p>