Which one of the following was a Saiva sect in ancient India?

1. The question asks to identify a Saiva sect in ancient India. 2. Ajivika was a major contemporary ascetic school of Jainism and Buddhism, focusing on determinism (niyati), not a Saiva sect. 3. Mattamayura was a prominent Saiva sect that flourished in Central India between the 8th and 13th centuries CE. They were known for their monastic establishments and influence on ruling dynasties like the Kalachuris. 4. Mayamata is a Vastu Shastra text, dealing with architecture and iconography, not a religious sect itself. 5. Isanasivagurudevapaddhati is a comprehensive Saiva Siddhanta text dealing with rituals, philosophy, and temple practices, attributed to Isanasivagurudeva Misra. While related to Saivism, it's a text or system, whereas Mattamayura refers to a specific historical sect.