Assertion : Amphioxus has a simple organization compared to vertebrates. Reason : Many important craniate structure are lacking in Amphioxus.A. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If both the assertion and reason are false

Assertion : Amphioxus has a simple organization compared to vertebrate

1.	Assertion : Amphioxus has a simple organization compared to vertebrates. Reason : Many important craniate structure are lacking in Amphioxus.A. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If both the assertion and reason are false
Answer» Correct Answer - A Amphioxus is devoid of heat, head kidneys and paired limbs. Paired sense organs are absent here receptors are of primitive types. A complete notochord is persistant with no vertebral column. This shows that it has a simple organization compared to vertebrates because many important craniate structures are lacking in it. But it is definitely a simple chordate such as a notochord, dorsal hollow nerve cord, and gill clefts.