Correct Answer: (a) Kharod, Lafa, Chhuri, Pander Bhattha
Solution:During the Kalchuri period according to the number of forts of the ruling kings was named as Chhattisgarh. In Ratanapur estate there were 18 forts which are Ratanpur, Vijaypur, Kharod, Maro, Kotgarh, Navagarh, Sodhi, Aukhar, Pander Bhatha, Semaria, Champa, Lafa, Chhuri, Kenda, Matin, Uproda, Pendra, and Kurkuti. Thus, option (a) will be correct answer.