Pure river of water of life, clear as crystal, proceeding out of the throne of God and of the Lamb, a phrase from Revelations, is depicted in which of the following? a. Last Supper from the Holy Sacrament Altarpiece b. Altar of the lamb from the Ghent Altarpiece c. Deposition, triptych from Notre-Dame d. Adoration of the Shepherds from the Portinari Altarpiece