Concept:
The term "Chaturveda" translates directly to the "Four Vedas," which comprise the core primary text layers of ancient Indian scriptural tradition.
Step 1: Isolating the core four canonical Vedas.
The foundational group of four Vedas consists of:
• Rigveda (The Veda of chants/hymns)
• Samaveda (The Veda of melodies and songs)
• Yajurveda (The Veda of rituals and prayers)
• Atharvaveda (The fourth primary Veda, omitted from the option list)
Options D (Ayurveda - Medicine) and E (Dhanurveda - Archery/Warfare) are classified as *Upavedas* (secondary or applied sciences), not part of the primary four structural text layers. Therefore, only A, B, and C apply.