according to news
·12823/24 Durg-Nizamuddin Chhattisgarh Sampark Kranti Express train has been augmented by one additional A.C. 2 Tier Coach up to 31.10.2013 when departing from Durg and up to 01.11.2013 when departing from Nizamuddin. The other features like timings, route, stoppages etc. will remain as unchanged.
so go with 2AC