Why are you surprised Dipti. For several years since they were introduced, for more than 2 decades in fact, Rajdhanis had only 2 classes of accommodation. AC Chair Car and 1AC. It was only later towards the beginning of the 90s that the AC Chair Cars were replaced by first 2AC and then by 3AC coaches, and that too in a phased manner. I have travelled by ACCC in HWNDLS Rajdhani Express at a fare of Rs. 175, in 1982 if my memory serves me right.