Complete the following table saying which of the routes 1...4 are on or off for each possible combination of values for A and B:
A B 1 2 3 4
0 0
0 1
1 0
1 1

 

A homework question, it seems.

 

And your answer is?

 

Can you walk me through one of them?

 

MOD NOTE: Moved to Homework Help from General Electronics Chat.

 

The question not only doesn't seem complete (since neither a desired truth table nor a complete circuit is presented), but NMOS and PMOST transistors are being used in roles inconsistent with digital CMOS circuits.