Correct Answer: (c) Rigveda, Samaveda, Yajurveda
Note: The three Vedas are jointly called vedatrayi are Rig veda, Samaveda and Yajurveda.
There are four Vedas in total; Rig Veda, Sama Veda, Yajur Veda, and Atharva Veda. Atharva Veda is the latest of all the four Vedas and did not exist when Vedatrayi was introduced. Hence, Atharva Veda is not a part of Vedatrayi.