I usually hear of 3-room, 4-room, 5-room, or Executive HDB flats. For 2-room flats, am I correct to say that it consists of a master room and a living room? But then what about 1-room HDB? Or is there such a thing at all?

Thanks for any enlightenment.

but for 2-room hdb, it usually consists of 1 bedroom and 1 living room.

当然就只能当bed room 咯