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Option 1 : A 2-input NOR gate
Concept:
CMOS is the combination of NMOS and PMOS.
MOS circuit combination has two networks i.e. PUN(Pull up network) and PDN(Pull down network).
Observation:
PUN consists two PMOS in series whereas PDN consists two NMOS in parallel.
A NOR gate can be implemented using two parallel NMOS and two series PMOS.
Hence,
The given logic circuit is 2-input NOR gate.
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