Primate spacing in the primary dentition is observed between
1. maxillary canines and first molars.
2. maxillary canines and lateral incisors.
3. mandibular canines and first molars.
4. mandibular canines and lateral incisors.

(1) and (4)

(2) and (3)

(1) and (3)

(4) only

(2) and (4)