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(C) The inductive effect is the permanent displacement of sigma electrons along a carbon chain due to the presence of an atom or group with a differen

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$-NH_2$

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(C) The inductive effect is the permanent displacement of sigma electrons along a carbon chain due to the presence of an atom or group with a different electronegativity.Groups that are electron-withdrawing exhibit a negative inductive effect ($-I$ effect).Among the given options,$-CH_3$,$-CH_2-CH_3$,and $-(CH_3)_2-CH^{-}$ are electron-donating groups (alkyl groups or anions),which exhibit a positive inductive effect ($+I$ effect).$-NH_2$ contains a highly electronegative nitrogen atom,which withdraws electron density from the carbon chain,thus exhibiting a negative inductive effect ($-I$ effect).

Negative inductive effect ($-I$ effect) is shown by:

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