I-bar clasp arms and circumferential clasp arms both
1. terminate in retentive undercuts lying gingival to the height of contour.
2. originate from the framework and approach the tooth undercut area from a gingival direction.
3. provide retention by the resistance of metal to deformation rather than frictional resistance of parallel walls.
4. are circular in cross-section

(1) and (3)

(2) and (4)

(4) only

All of the above

(1) (2) (3)