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কোন বিক্রিয়াটি সঠিক নয় ?

C H_{3} C H_{2} B r + K O H \overset{s l o w b o t}{\to} C H_{2} = C H_{2}

C H_{2} B r C H_{2} B R + Z n \overset{4}{\to} C H_{2} = C H_{2}

C H_{3} C H_{2} B R + K O H + H_{2} O \overset{4}{\to} C H_{2} C H_{2} O H

C H_{3} C O O H + Z n \overset{4}{\to} C H_{4} + Z n O + C O

ANS : 4

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