Step 1: Concept
In Indian classical music, ragas are melodic frameworks that use specific notes or swaras. Chatushruti Rishabha is a note with a frequency ratio of 9:8 to the tonic (Sa), and Kaishiki Nishada is a microtonal variant of Nishada, which is typically represented as a flat seventh note.
Step 2: Meaning
Chatushruti Rishabha refers to the note R2 (F#) in Western music notation, while Kaishiki Nishada represents a slight lowering of the N7 (F) note, making it approximately F-.
Step 3: Analysis
To determine which ragas use Chatushruti Rishabha and Kaishiki Nishada, we need to analyze each option:
A) Saveri and Surati:
- Saveri is known for its use of Chatushruti Rishabha.
- Surati does not typically use Kaishiki Nishada.
B) Surati and Arabhi:
- As mentioned earlier, Surati does not use Kaishiki Nishada.
- Arabhi uses Kaishiki Nishada but not necessarily Chatushruti Rishabha.
C) Surati and Kharaharapriya:
- Both ragas are known to use Chatushruti Rishabha.
- Kharaharapriya also uses Kaishiki Nishada, making it a suitable choice.
D) Arabhi and Suddha Saveri:
- Arabhi uses Kaishiki Nishada but not necessarily Chatushruti Rishabha.
- Suddha Saveri does not use Kaishiki Nishada.
From the analysis, only option C (Surati and Kharaharapriya) correctly identifies ragas that use both Chatushruti Rishabha and Kaishiki Nishada. However, since Surati is known to use Chatushruti Rishabha but not Kaishiki Nishada, the correct pair must be Kharaharapriya and Surati.
Step 4: Conclusion
The ragas that correctly use both Chatushruti Rishabha and Kaishiki Nishada are Kharaharapriya and Surati. However, based on the given options, option C is the closest correct choice as it includes Surati which uses Chatushruti Rishabha.
Final Answer: (C)