Treatment of cyclopentanone with methyl lithium gives which of the following species?

Treatment of cyclopentanone  with methyl lithium gives which of the following species?

1. Cyclopentanonyl anion
2. Cyclopentanonyl cation
3. Cyclopentanonyl radical
4. Cyclopentanonyl biradical

Asked in: NEET 2015 (Phase 1)

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