The correct answer is: a) Chera Dynasty.
Cheraman Perumal was a legendary king of the Chera dynasty who is said to have converted to Islam in the 7th century CE. He is considered to be the first Muslim ruler in India and is said to have built the first mosque in Kerala, the Cheraman Juma Masjid.
The Chola dynasty was a Tamil dynasty that ruled over southern India from the 9th to the 13th centuries CE. The Pandyan dynasty was another Tamil dynasty that ruled over southern India from the 6th to the 13th centuries CE. The Pallava dynasty was a Tamil dynasty that ruled over southern India from the 3rd to the 9th centuries CE.
All three dynasties were powerful and influential, but the Chera dynasty was the first to convert to Islam. This conversion is significant because it marks the beginning of Islam in India.