For the given circuit, the input digital signals are applied at the terminals A, B and C. What would be the output at the terminal y ?
For the given circuit, the input digital signals are applied at the terminals A, B and C. What would be the output at the terminal y ?

1. Output waveform (1): y stays at 0 V throughout t1 to t6 (only spikes at t1..t6 marks)
2. Output waveform (2): 5 V between t1 and t3, 0 V between t3 and t5, 5 V after t5
3. Output waveform (3): constant 5 V
4. Output waveform (4): 0 V between t1 and t3, 5 V between t3 and t5, 0 V after t5