the positive degree: Nelson Mandela was one of the greatest leaders that we have ever known.

• ক No other leader that we had ever known was as great as Nelson Mandela.
• খ Nelson Mandela is as great as other leaders that we have ever known.
• গ Very few leader that we have ever known was as great as Nelson Mandela.
• ঘ Very few leaders that we have ever known were as great as Nelson Mandela. ✅ সঠিক উত্তর