JEE Main Chemistry question

The correct order of increasing basic nature of the given conjugate bases is:

• (A)RCOO⁻ < HC≡C⁻ < NH₂⁻ < R⁻Correct
• (B)RCOO⁻ < HC≡C⁻ < R⁻ < NH₂⁻
• (C)R⁻ < HC≡C⁻ < RCOO⁻ < NH₂⁻
• (D)RCOO⁻ < NH₂⁻ < HC≡C⁻ < R⁻