To implement a two-input AND function in relay logic, how should the input circuits be connected and when is the output energized?

• A. In parallel; energized if any input is active.
• B. In series; energized only if both inputs are active.
• C. In parallel with one input inverted; energized if either input is inactive.
• D. In series with an inverter on the output; energized if exactly one input is active.

Answer: (B)