The correct answer is A. 010.
A SCSI ID is a unique number assigned to each SCSI device on a SCSI bus. The SCSI bus is a serial bus that allows multiple devices to communicate with each other. The SCSI ID is used to identify each device on the bus so that they can communicate with each other.
The SCSI ID is typically set using jumpers on the device. The jumpers are small, plastic connectors that are used to connect or disconnect electrical connections. The jumper setting for the fourth SCSI ID is 010. This means that the first jumper should be connected to pins 1 and 2, and the second jumper should be connected to pins 3 and 4.
The other options are incorrect because they do not correspond to the fourth SCSI ID. Option B, 110, is the jumper setting for the fifth SCSI ID. Option C, 011, is the jumper setting for the sixth SCSI ID. Option D, 101, is the jumper setting for the seventh SCSI ID. Option E, 1, is the jumper setting for the eighth SCSI ID.
I hope this helps! Let me know if you have any other questions.