Vaishnava theology (Vaikhanasa): Identify the fivefold conception of Vishnu. From the items listed — brahman, purusha, prakriti, satya, achyuta, aniruddha — select the five that constitute the Vaikhanasa fivefold conception. Choose the correct set.

Given
Select the five Vaikhanasa conceptual forms of Vishnu from six provided terms.

Concept/Approach
Vaikhanasa texts present a fivefold manifestation involving the supreme principle and four personal forms. Prakriti (primordial matter) is not counted among the five forms of Vishnu in this doctrinal set.

Reasoning
Chosen: Brahman (supreme), Purusha, Satya, Achyuta, Aniruddha.Excluded: Prakriti (cosmic matter, not a personal or transcendent form).

Final Answer
Brahman, Purusha, Satya, Achyuta, Aniruddha.