For the two inputs gate circuit bellow:

a$)$ if $A=B=0,$ the output $Y=1$ and this is a NOR gate that belongs to the RTL technology

b$)$ if $A=B=0,$ the output $Y=1$ and this is a NAND gate that belongs to the RTL technology

c$)$ if $A=B=0,$ the output $Y=0$ and this is an OR gate that belongs to the TTL technology

d$)$ if $A=B=0,$ the output $Y=0$ and this is an AND gate that belongs to the RTL technology