In a flat drawing of 3-methylcyclohex-1-ene the ring carbons C1 to C6 run clockwise when viewed from above, with C1=C2 the double bond. The CH${}_3$ group on C3 points up (towards the viewer) and the H on C3 points down. What is the CIP descriptor of C3?

1. AR; the priority order is C2 > C4 > CH${}_3$ > H
2. BR; the priority order is C4 > C2 > CH${}_3$ > H
3. CS; the priority order is C4 > C2 > CH${}_3$ > H
4. DS; the priority order is C2 > C4 > CH${}_3$ > H