Option 1: Rigveda is one of the oldest texts in Hinduism and consists of hymns primarily focused on the deities. It does mention some rituals, but it is not primarily dedicated to discussing rituals.

Option 2: Yajurveda is the correct answer. It is one of the four Vedas and specifically deals with rituals, including instructions for performing sacrifices and ceremonies. It provides detailed guidelines on how to conduct various rituals and ceremonies.

Option 3: Samaveda is another Veda but is mainly concerned with musical chants and melodies. It contains hymns from the Rigveda but focuses more on their musical rendering rather than ritualistic instructions.

Option 4: Atharveda is a Veda that consists of hymns, spells, and incantations used for rituals and healing. While it does contain some ritualistic content, it is not primarily dedicated to rituals like the Yajurveda.

Therefore, the correct answer is option 2: Yajurveda.