Complete the following sentence with the appropriate Adjective Clause, from the options given below.

The time _______ the train leaves is not yet fixed.

when

Here's why:

• Where indicates a location, not the time. It would be used if you were asking about the place where the train leaves, not the time.
• When modifies the noun "time" and specifies the moment the train leaves. It answers the question "at what time will the train leave?"
• How describes the manner or way something is done. It wouldn't be appropriate for describing the time the train leaves.
• Who refers to a person or thing. It wouldn't be appropriate for describing the time the train leaves.