The number of terminals in an Op-amp ______________

(a) 6

(b) 2

(c) 5

(d) 3

I got this question during an interview for a job.

This intriguing question originated from Operational Amplifier Terminals,Terminal Voltages and Currents in portion The Operational Amplifier of Electric Circuits

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  }
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  (B) 5 and 12
  (C) 5 and 20
  (D) 12 and 20
  
  

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