Shutting signal in the color light signal system under the starter of which light is visible in the on-condition? A. Yellow B. Two White parallel C. Single white D. No light

The correct answer is: B. Two White parallel

A shutting signal in the color light signal system under the starter of which light is visible in the on-condition is two white parallel lights.

The other options are incorrect because:

• A yellow light is not used in a shutting signal.
• A single white light is used in a starting signal, not a shutting signal.
• No light is not visible in a shutting signal.