MCQ
The elephant tusk shell is
- ✓Dentalium
- BNautilus
- CLimax
- DOctopus
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| $(a)$ Ophura | $(i)$ Mollusca |
| $(b)$ Physalia | $(ii)$ Platyhelminthes |
| $(c)$ Pinctada | $(iii)$ Echinodermata |
| $(d)$ Planaria | $(iv)$ Coelenterata |
Select the correct option