Answer :
The correct answer is option 1, red chevron marks in the nonlanding portion of the runway.
A displaced threshold is a portion of the runway that cannot be used for landing, takeoff, or taxiing, but can be used for taxiing to and from the runway. It is marked by a series of chevron markings painted on the runway surface. These chevrons are red and are located in the nonlanding portion of the runway. They indicate the beginning of the portion of the runway that is not available for landing or takeoff. It is important for pilots to be aware of the displaced threshold on an instrument runway as it affects their approach and landing procedures.
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