Which one of the following Carnatic music ragas is similar to Raga Bilawal in Hindustani music?

1. A

   Nat Bhairavi

   Nat Bhairavi is a Carnatic raga corresponding to the Hindustani raga Asavari, known for its use of komal rishabh, gandhar, and dhaivat, making it incorrect here.

2. B

   Kamavardhini

   Kamavardhini is a Carnatic raga that corresponds to the Hindustani raga Pantuvarali (or Purvi), featuring shifted notes that differ from Bilawal, making it incorrect.

3. C

   Hanumatodi

   Hanumatodi is a fundamental Carnatic raga corresponding to the Hindustani raga Bhairavi, characterized by all komal swaras, making it incorrect.

4. D

   Dheera Shankarabharanam

   Dheera Shankarabharanam is the 29th Melakarta raga in the Carnatic system and is structurally identical to the Hindustani raga Bilawal, using all natural notes (shuddha swaras) corresponding to the Western major scale.

Summary. Official key is (d) because Dheera Shankarabharanam directly mirrors the natural note structure of Hindustani music's Raga Bilawal, whereas Nat Bhairavi aligns with Asavari, Kamavardhini with Pantuvarali, and Hanumatodi with Bhairavi.