The correct answer is: None of these.
In automatic area, when all signals and communications have failed, the driver is issued a “Stop and Proceed” order. This order is given by a police officer or other authorized person. The driver must stop their vehicle and wait for the order to be given before proceeding.
The options A, B, and C are all types of train orders. A T/B-912 is a train order that authorizes a train to proceed to a specific location. A T/C-912 is a train order that authorizes a train to proceed to a specific location and then stop. A T/A-912 is a train order that authorizes a train to proceed to a specific location and then proceed to another location.
However, none of these options are appropriate for the situation described in the question. In automatic area, when all signals and communications have failed, the driver is issued a “Stop and Proceed” order, not a train order.