OR Gate in circuit using NPN TRANSISTORS

This is the OR gate using NPN transistors. There are three logic switches connected onto the base of every single transistor. Truth Table: A B C out 0 0 0 0 0 0 1 1 0 1 0 1 0 1 1 1 1 0 0 1 1 0 1 1 1 1 0 1 1 1 1 1