The correct answer is: a) Keeladi
Keeladi is a Mesolithic site located in Sivagangai district of Tamil Nadu, India. It is one of the most important archaeological sites in the state. The site was discovered in 2018 and has been excavated since then. The excavations have revealed a number of artifacts, including stone tools, pottery, and beads. The site is dated to the 2nd millennium BCE.
The Teri sites are a group of Mesolithic sites located in the Teri River valley in Tamil Nadu. The sites were discovered in the 1970s and have been excavated since then. The excavations have revealed a number of artifacts, including stone tools, pottery, and beads. The sites are dated to the 3rd millennium BCE.
Kodumanal is a megalithic site located in Erode district of Tamil Nadu. It is one of the most important archaeological sites in the state. The site was discovered in 1900 and has been excavated since then. The excavations have revealed a number of artifacts, including stone tools, pottery, and beads. The site is dated to the 2nd millennium BCE.
Arikamedu is an ancient port city located in Puducherry district of Tamil Nadu. It is one of the most important archaeological sites in the state. The site was discovered in the 18th century and has been excavated since then. The excavations have revealed a number of artifacts, including Roman coins, pottery, and beads. The site is dated to the 1st century BCE.
Keeladi is a more significant Mesolithic site than the other options because it is more recent, has been excavated more extensively, and has yielded more artifacts.