2A, 3A. SL ye main SAMJHTA hu LEKIN 2S kaun sa seating hai
2S is a Non AC class coach which are the cheapest class to travel by the Indian Railways. This class is common in most daytime Intercity and Janshatabdi trains.
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Indian Railway Classes: AC (1A,2A,3A), Sleeper (SL) & Seating (EA,EC,CC, 2S)
2s generel class hai pahle jo general coach hota tha usiko 2s bana diya hai farq sirf itna hai ke ye seat reserve ho rahi hai sirf baithne ke liye