Name a common type of whiskey used in cocktails.

Bourbon, rye, or Scotch are widely recognized types of whiskey that are commonly used in cocktails due to their distinct flavors and characteristics. These types of whiskey provide a range of taste profiles, from the sweet and rich notes of bourbon to the spicier and herbal nuances found in rye, and the smoky qualities associated with Scotch. This versatility makes them ideal for a variety of cocktails, such as Manhattans, Old Fashioneds, and Whiskey Sours, each of which highlights different aspects of these whiskey types.

In contrast, the other choices do not pertain to whiskey. Tequila is a distilled spirit made from the agave plant and is primarily used in Mexican cocktails like margaritas. Rum is derived from sugarcane and is popular in tropical cocktails like mojitos and daiquiris, while brandy is a spirit produced from fermented fruit juice, often used in drinks like Sidecars or as an after-dinner drink. Thus, the unique qualities of bourbon, rye, or Scotch make them the correct choice when identifying whiskey commonly used in cocktails.