Anaesthesia

You are about to perform surgery on a patient with an ASA score of 3 (American society of Anaesthesiologists). What does the score of 3 mean?

The patient has mild systemic disease, but no limitation of activity

The patient has severe systemic disease that limits activity but not incapacitating

The patient is moribund and not expected to survive 24 hours even with operation

The patient has incapacitating systemic disease which poses a threat to life