Which of the following organisms exhibit eith | vedclass

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(D) $1$. $Platyhelminthes$ (flatworms) are generally hermaphroditic and exhibit internal fertilization.$2$. $Mollusca$ (mollusks) exhibit both interna

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$ (B) $ and $ (C) $ both

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(D) $1$. $Platyhelminthes$ (flatworms) are generally hermaphroditic and exhibit internal fertilization.$2$. $Mollusca$ (mollusks) exhibit both internal and external fertilization depending on the class (e.g.,bivalves often show external,while cephalopods show internal).$3$. $Chordata$ (chordates) exhibit both internal and external fertilization depending on the group (e.g.,most mammals show internal,while many bony fishes and amphibians show external).$4$. Therefore,both $Mollusca$ and $Chordata$ exhibit either internal or external fertilization.

Phylum/Class	Excretory organ	Circulatory system	Respiratory organ
Arthropoda	$...............$	$...............$	Lungs/Gills/Tracheal system
$...............$	Nephridia	Closed	Skin/Parapodia
$...............$	Metanephridia	Open	$...............$
Amphibia	$...............$	Closed	Lung

Which of the following organisms exhibit either internal or external fertilization?

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