Which one is not a Shadja-Madhyam Samvad?

Correct option is B

Correct Option: b)
Shadja-Madhyam Samvad is a fundamental concept of acoustic consonance in Indian music theory.
Information Booster:
· The interval between Ga (Gandhar) and Ni (Nishad) is not a Shadja-Madhyam Samvad.
· In the standard structure of the ancient Gramas (scales), the distance between these two notes does not equal 9 shrutis.
· In contrast, the pairs Dha-Re, Pa-Sá (where Sá is the upper octave Shadja), and Re-Pa all represent the classic 9-shruti interval, making them perfect examples of Shadja-Madhyam Samvad.
Additional Knowledge:
· Identifying a Shadja-Madhyam Samvad requires knowledge of the shruti count between swaras.
· The Ga-Ni interval is a different consonance (potentially a 10-shruti interval in some contexts) and is therefore the odd one out in this list of 9-shruti pairs.