As per norms for desirable amenity as given to model station, the public address system
should be provided on stations classified as ---
(a) A & B
(b) A,B & C*
(c) A,B,C & D
(d) A, B,C, D & E
(e) A
should be provided on stations classified as ---
(a) A & B
(b) A,B & C*
(c) A,B,C & D
(d) A, B,C, D & E
(e) A