Q.Which TSM is widely practiced and culturally accepted in Tamil Nadu? - explain.

Step 1. The chapter states this directly: 'Siddha is the most popular, widely practiced and culturally accepted system in Tamil Nadu.'

Step 2. It is based on texts written by 18 Siddhars, documented in the form of poems in Tamil; there are different opinions on exactly who constituted the 18, and the Siddhars themselves came from Tamil Nadu and beyond.

Step 3. Siddha is principally grounded in the Pancabhuta philosophy, under which three humors — Vātam, Pittam and Kapam — govern health, with illness following any disturbance of their equilibrium; its roughly 800 herbal drug sources sit alongside animal parts, marine products and minerals, with a particular specialism in mineral-based drugs valued for their long shelf-life, an …

Recall the chapter's explicit statement naming Siddha as Tamil Nadu's most practised TSM, then …

• Naming Ayurveda instead, since it is also discussed in the same section, without checking which one …