Which two southern Rhône crus are located on the west bank of the Rhône river?

The two southern Rhône crus located on the west bank of the Rhône river are indeed Lirac and Tavel. This area is known for its production of quality wines, particularly rosé, which is a hallmark of Tavel, while Lirac includes a broader variety of styles.

Lirac is positioned just across the river from Châteauneuf-du-Pape, making its geographical placement significant. Tavel is recognized specifically for its rosé production, and both appellations are part of the southern Rhône region that experiences similar climatic conditions, contributing to their style and character.

The other listed options contain appellations that are primarily found on the east bank of the Rhône. For instance, Châteauneuf-du-Pape and Gigondas are located on the right bank, making option B inaccurate. Likewise, Vacqueyras and Rasteau also lie on the east bank, while Beaumes-de-Venise and Seguret are also positioned similarly, underlining why those combinations do not match the criteria regarding the location relative to the river.