The correct options are
A Mangulam
B Muttupatti
C Pugalur
Tamil-Brahmi inscriptions have been discovered in more than 30 sites in present-day Tamil Nadu. These are mostly sighted on cave surfaces and rock shelters. Some of the important caves with Tamil-Brahmi inscriptions are Mangulam, Muttupatti, Pugalur, Arachalur and Kongarpuliyankulam and Jambai. Several caves with such inscriptions are found near modern-day Madurai.