What is the difference between a coil and a contact in ladder logic?

What is the difference between a coil and a contact in ladder logic?

• A. A contact is a condition that evaluates to true/false; a coil is an output energized when the rung evaluates to true.
• B. A coil is a condition; a contact is an output energized when the rung is true.
• C. Both are input devices.
• D. Both are memory bits.

Answer: (A)