What does the term "benign" mean when referring to a tumor?

If a doctor describes a condition as "acute," they mean it is:

Which of the following words refers to the identification of the nature of an illness or other problem by examination of the symptoms?

A substance with no medical effects, given as a control in testing a drug

A medical instrument used to measure blood pressure

The localized area where an infection originates

What does a "cardiologist" specialize in treating?

Conditions affecting the bones and joints