What is the primary indication for Benazepril Hydrochloride?

Benazepril Hydrochloride is primarily indicated for the treatment of hypertension, which is high blood pressure. It belongs to a class of medications known as angiotensin-converting enzyme (ACE) inhibitors. By inhibiting the enzyme that converts angiotensin I to angiotensin II, Benazepril helps to relax blood vessels, allowing for easier blood flow and subsequently lowering blood pressure.

In relation to the other options, heart failure can be treated with Benazepril, but it is often a secondary indication rather than the primary one. Diabetes management and high cholesterol are unrelated to Benazepril's mechanism of action or its primary therapeutic use. Thus, its main role is to effectively control hypertension, making 'Hypertension' the correct answer.