Which of the following statements is/are correct?
a. Mollusca have a chitinious exoskeleton. b. Mollusca have an open circulatory system. c. Respiration in Mollusca is by gills.
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Which of the following statements is/are correct?
a. Mollusca have a chitinious exoskeleton. b. Mollusca have an open circulatory system. c. Respiration in Mollusca is by gills.