Which of the following does not exist in free form [Kerala PMT 2004]

1.	Which of the following does not exist in free form [Kerala PMT 2004]
A.	\[B{{F}_{3}}\]
B.	\[BC{{l}_{3}}\]
C.	\[BB{{r}_{3}}\]
D.	\[B{{H}_{3}}\]
E.	None of these
Answer» E. None of these

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Which of the following does not exist in free form [Kerala PMT 2004]

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