Collection of pus in the pleural space is termed as -

Correct option is B

Sol. Empyema is the accumulation of pus in the pleural space, usually due to bacterial infections such as pneumonia, tuberculosis, or lung abscess. It causes fever, chest pain, breathlessness, and requires drainage along with antibiotics. In severe cases, surgical intervention (thoracostomy) may be necessary.
Explanation of Each Option:
· Pleurisy: Incorrect; refers to inflammation of the pleura, but does not always involve pus accumulation.
· Empyema: Correct answer; the collection of pus in the pleural cavity due to infection.
· Emphysema: Incorrect; a lung disease causing air trapping in alveoli, unrelated to pus accumulation.
· Pleural effusion: Incorrect; refers to fluid accumulation in the pleural space, which can be non-infectious (e.g., due to heart failure).