Which of the following is weakly acidic

1.	Which of the following is weakly acidic
A.	\[C{{H}_{2}}=C{{H}_{2}}\]
B.	\[{{C}_{6}}{{H}_{6}}\]
C.	\[C{{H}_{3}}-C\equiv CH\]
D.	\[C{{H}_{3}}-C\equiv C-C{{H}_{ 3}}\]
Answer» E.

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Which of the following is weakly acidic

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