In the natural rubber ?Caoutchouc?, the isoprene units are joined by

1.	In the natural rubber ?Caoutchouc?, the isoprene units are joined by
A.	Head-to-head
B.	Tail-to-tail
C.	Head-to-tail
D.	All of these
Answer» D. All of these

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In the natural rubber ?Caoutchouc?, the isoprene units are joined by

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