Final answer:
Third Party Liability coverage of an automobile policy does not cover damages to the insured's own property.
Step-by-step explanation:
The Third Party Liability coverage of an automobile policy is designed to cover damages and injuries caused to others. In the given scenario, where the insured drove his automobile into his own garage door, the Third Party Liability coverage would not cover any damages to the insured's automobile or the garage door. This is because the coverage is specifically for third-party damages and does not provide coverage for damages to the insured's own property. Therefore, option b) 'Neither the automobile nor the garage door' would be the correct answer.