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Tick the correct statement

A

1)Proximal and distal centrioles in the middle piece of sperm help anchor the flagellum

B

2)whereas proximal centrioleis non functional, distal centriole acts as basal body for the flagellum of sperm

C

3)The functions of proximal and distal centrioles are not known

D

4)Proximal centriole forms the spindle fibres during cleavage an the distal centriole anchors the flagellum of sperm

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The correct Answer is:
D
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