Step 1: Concept
A Tillana is a highly rhythmic, fast-paced, and energetic compositional form in Carnatic music, extensively used in both music concerts and classical dance (Bharatanatyam) recitals.
Step 2: Evaluating the Composers
- Shyama Shastry (one of the Trinity) is celebrated for his deep, serious Kritis and Swarajatis.
- Purandara Dasa (the Father of Carnatic Music) composed early Gitas, Sooladis, and devotional Devaranamas.
- Kshetragna is the undisputed master of slow, highly expressive, romantic-spiritual Padams.
- Patnam Subramania Iyer (1845--1902) was an exceptionally brilliant late-modern composer who created several highly popular, sparkling, and rhythmically complex Tillanas (such as the famous Tillana in Raga Khamas set to Adi Tala).
Step 3: Conclusion
Thus, Patnam Subramanya Iyer is the correct composer of Tillanas among the choices, matching option (C).
Final Answer: (C)