If all inputs to a TTL NAND gate are low, what is the ON, OFF condition of each transistor in the circuit?

1.

If all inputs to a TTL NAND gate are low, what is the ON, OFF condition of each transistor in the circuit?

[A].	Q1-ON, Q2-OFF, Q3-ON, Q4-OFF
[B].	Q1-ON, Q2-ON, Q3-OFF, Q4-OFF
[C].	Q1-OFF, Q2-OFF, Q3-ON, Q4-ON
[D].	Q1-OFF, Q2-ON, Q3-OFF, Q4-ON

Answer: Option A

Explanation:

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