Which of the following best describes a centric holding cusp of a mandibular left second molar?
a. it is the distofacial cusp and occludes in the embrasure between maxillary first and second molars.
b. it is the distofacial cusp and occludes in the central fossa of a maxillary second molar.
c. it is the distolingual cusp and occludes in the embrasure between maxillary first and second molars.
d. it is the distolingual cusp and occludes in the central fossa of a maxillary second molar.

The answer is B- It is the distofacial cusp and occludes in the central fossa of a maxillary second molar.

Explanation:

Centric holding cusp are also called Stamp Cusps, it is a type of cusp in which include the facial cusp of the mandibular and palatal cusps of the maxillar posterior teeth. The occlude into the central fossa and marginal ridges of the opposing teeth. Centric occlusion is the position of mandibular condyle when the jaws are closed and the teeth are in maximum intercuspation. Occlusion is the static relationship of teeth, it means "closing up".

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.