Which of the following is a commonly used benzodiazepine?

Benzodiazepines are a class of medications that are commonly prescribed for conditions such as anxiety, insomnia, and seizures due to their sedative and anxiolytic properties. Xanax, the brand name for alprazolam, is a well-known benzodiazepine that works by enhancing the effects of a neurotransmitter called gamma-aminobutyric acid (GABA) in the brain. This leads to a calming effect, making it effective for treating anxiety disorders.

The other options provided do not belong to the benzodiazepine class. Propranolol is a beta-blocker used primarily for cardiovascular conditions, atorvastatin is a statin used to lower cholesterol levels, and lisinopril is an angiotensin-converting enzyme (ACE) inhibitor used to treat hypertension and heart failure. Each of these medications serves different therapeutic purposes and mechanisms of action distinct from those of benzodiazepines.