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[A] : Nuclear membrane of karyotheca for...

[A] : Nuclear membrane of karyotheca forms an envelope-like structure called nuclear envelope around the nuclear contents .
[R] : Each membrane is about 75-90 Å thick and lipoproteinous in nature .

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

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