Answer: Both (a) & (b)
Notes: The Calcutta Tramways Company Ltd operates the Kolkata tram, currently the oldest electric tramway in Asia and India's only existent tram system, since 1880. With over 45 routes throughout Kolkata and its surrounding areas, CTC buses complement its tram service. The initial bus service was introduced from Rajabazar with a fleet of 40 buses, augmented in 1993 with service from Kidderpore depot.
