4B
From The Big Bang Theory Wiki
Penny's apartment number. It has three rooms: the main room with living area and kitchen, a bedroom, and a bathroom which connects to the bedroom. The previous tenant was Louie/Louise (0101, 0102).
Penny's apartment number. It has three rooms: the main room with living area and kitchen, a bedroom, and a bathroom which connects to the bedroom. The previous tenant was Louie/Louise (0101, 0102).