See image — GOC and Organic Chemistry Basics Chemistry Question

💡 Solution & Explanation

# Carbanion Classification **Step 1: Define a carbanion** A carbanion is a negatively charged carbon species with the structure $R_3C^-$, where carbon bears a lone pair of electrons and a negative charge. **Step 2: Check nucleophilicity** A nucleophile is an electron-rich species that donates electron pairs to electrophilic centers. Since carbanions possess excess electron density (lone pair + negative charge), they are **strong nucleophiles** and readily attack electron-deficient atoms. **Step 3: Check basicity** A base accepts protons ($H^+$). Carbanions have a lone pair capable of accepting protons: $$R_3C^- + H^+ \rightarrow R_3C-H$$ Therefore, carbanions are **strong bases**. **Step 4: Conclusion** Carbanions exhibit both nucleophilic and basic character due to their electron-rich nature with available lone pairs. **Answer: (C) Both (A) and (B)** Carbanions are classically used in organic synthesis as **nucleophiles** (e.g., Grignard reagents, organolithium compounds) and as **bases** (e.g., deprotonating weakly acidic compounds).