Which of the following grape varieties is not permitted in white Bordeaux wines?
C. Sauvignon Blanc
Chardonnay is not one of the grape varieties permitted in white Bordeaux wine. Seven grapes can comprise white Bordeaux: the main three—sémillon, sauvignon blanc, and muscadelle—plus these more unusual suspects: ugni blanc, colombard, merlot blanc, and sauvignon gris. The latter are used in extremely small amounts if at all.