Ambulacral grooves are absent in the living forms of the class [Pb. PM – McqOptions

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1.	Ambulacral grooves are absent in the living forms of the class [Pb. PMT 1999; AIIMS 2002]
A.	Crinoidea
B.	Ophiuroidea
C.	Asteroidea
D.	Echinodermata
Answer» C. Asteroidea

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