Medicine NMCLE Set 2

While inserting a central venous catheter, a patient develops respiratory distress. The most likely cause is:

A 30 year old man presented with fever, cough, expectoration and breathlessness of 2 months duration. Contrast enhanced computed tomography of the chest showed bilateral upper lobe fibrotic lesions and mediastinum had enlarged necrotic nodes with peripheral rim enhancement. Which one of the following is the most probable diagnosis?

Which one of the following conditions may lead to exudative pleural effusion?