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(C) Cyclostomes are a group of jawless vertebrates.Statement $(a)$ is correct: They lack scales and paired fins.Statement $(b)$ is incorrect: They hav

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$(b)$ and $(d)$ only

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(C) Cyclostomes are a group of jawless vertebrates.Statement $(a)$ is correct: They lack scales and paired fins.Statement $(b)$ is incorrect: They have a circular mouth,but they are jawless (agnathans).Statement $(c)$ is correct: They bear $6-15$ pairs of gill slits for respiration.Statement $(d)$ is incorrect: Cyclostomes are marine but migrate to fresh water for spawning (anadromous migration),after which they die.Therefore,statements $(b)$ and $(d)$ are incorrect.

Select the incorrect statements with respect to Cyclostomes:
$(a)$ They lack scales and paired fins.
$(b)$ They have a circular mouth with jaws.
$(c)$ They bear $6-15$ pairs of gills.
$(d)$ They migrate to deep sea for spawning.
Choose the most appropriate answer from the options given below:

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Select the incorrect statements with respect to Cyclostomes:$(a)$ They lack scales and paired fins.$(b)$ They have a circular mouth with jaws.$(c)$ They bear $6-15$ pairs of gills.$(d)$ They migrate to deep sea for spawning.Choose the most appropriate answer from the options given below: