कार्बऋणायन है -

  • क्षार
  • नाभिक स्नेही
  • (A) व (B) दोनों
  • कोई नहीं

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The correct answer is (C).

To understand why, let's break it down:

  1. कार्बऋणायन (Carbanion) is a molecule that contains a carbon atom with a negative charge.
  2. क्षार (Base) is a substance that can accept protons (H⁺) or donate an electron pair.
  3. नाभिक स्नेही (Nucleophile) is a chemical species that donates an electron pair to an electrophile to form a chemical bond in reaction.

Given these definitions:

  • A carbanion is indeed a base because it can accept a proton due to its negative charge.
  • It is also a nucleophile because it can donate its lone pair of electrons during a chemical reaction.

Therefore, a carbanion fulfills the criteria for being both a base and a nucleophile. Hence, the correct answer is (C) - (A) व (B) दोनों.

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