A patient suffering from AIDS presents with history of dyspnea and non- productive cough x-ray shows bilateral perihilar opacities without pleural effusion and lymphaden-opathy. Most probable etiological agent is :: (A) Tuberculosis, (B) CMV, (C) Kaposis sarcoma, (D) Pneumocystis carinii
Answer is D. D i.e. Pneumocystic carinii