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নিচের কোনটি সঠিক এসিডক্রম?

H - O H > H C \equiv C R > H N H_{2} > H C H = C H_{2}

H C \equiv C R > H - O F I > H C H = C H_{2} > H - N H_{2}

H - H N > H - O H > F C \equiv C R > H C H = C H_{2}

H - C H = C H_{2} > H - N H_{2} > H - C \equiv C R > H - O H

ANS : 2

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