True or false 1. Bronchoscopy with BAL is mainstay of diagnosis for pneumocystic pneumonia 2. Pneumatoceles are seen in all cases of pneumocystic pneumonia 3. CD4 count < 350 /µL is indication for prophylaxis against pneumocyctis carini pneumonia 4. Trimethoprim - sulfamethoxazole is drug of choice for prophylaxis.