what is 3a in train

In Indian trains, 3A refers to the Third AC or AC 3-Tier class. This is the most common and preferred class of travel for Indian middle-class passengers. Third AC Sleeper has 8 berths in each compartment, with 6 berths and 2 side berths. The class is air-conditioned and offers a fairly good travel experience at an affordable price. The capacity of a Third AC coach is typically 64-72 passengers. Bedding is included in the fare, but there are no reading lights.