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Question

An internal shell is absent in

A
Octopus
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B
Sepia
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C
Loligo
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D
Both B and C
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Solution

The correct option is A Octopus
Octopus is mollusk without a shell. An octopus has no internal or external skeleton allowing it to squeeze through tight places. They have neither a protective outer shell like the Nautilus nor any vestige of an internal shell or bones, like cuttlefish or squid.
So, the correct answer is option (A).

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