How inversion is created in sensor logic using normally closed contact?

• A. Place a normally closed contact in series with the coil; the coil energizes when the input is absent.
• B. Place a normally closed contact in series with the coil; the coil energizes when the input is present.
• C. Place a normally closed contact in parallel with the coil; coil energizes regardless.
• D. Use a normally open contact to achieve inversion.

Answer: (A)