Whether Extreme Unction is a sacrament?

Objections

Objection 1 : It would seem that Extreme Unction is not a sacrament. For just as oil is used on sick people, so is it on catechumens. But anointing of catechumens with oil is not a sacrament. Therefore neither is the Extreme Unction of the sick with oil.
Objection 2 : Further, the sacraments of the Old Law were figures of the sacraments of the New Law. But there was no figure of Extreme Unction in the Old Law. Therefore it is not a sacrament of the New Law.
Objection 3 : Further, according to Dionysius (Eccl. Hier. iii, v) every sacrament aims at either cleansing, or enlightening, or perfecting. Now Extreme Unction does not aim at either cleansing, or enlightening, for this is ascribed to Baptism alone, or perfecting, for according to Dionysius (Eccl. Hier. ii), this belongs to Confirmation and the Eucharist. Therefore Extreme Unction is not a sacrament.