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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Saurabh 1 Best Answer
This one seems to be Rusophycus which probably belongs to lower cambrian. While if one talk about Rhynconella trinodosi, a brachiopod date back to Triassic in most of the lithologies . Syringothyris Cuspidata belongs to Carboniferous and Actinodon risiensis has it's traces from Permain Or one cau say lower-middle Permain. So B should be correct.