Which of the following is categorized as a forbidden Dangerous Good?

The correct choice highlights a category of Dangerous Goods that are strictly prohibited on aircraft due to their potential to cause significant risk to safety. Explosives, liquid oxygen, and gun powder fall under this category because they are capable of creating hazardous situations, including explosions or fires, if not handled properly. Regulations in the aviation industry, especially under the guidelines of the Air Carrier Access Act and related safety standards, are designed to prevent any type of dangerous materials from being transported in the passenger area of an aircraft.

The other options mention items that are generally permitted for air travel. Packaged food is typically allowed, barring any specific restrictions related to liquid contents or hazardous materials present in the food packaging. Personal medications are also permissible, as they are essential for health and safety, provided they are properly labeled and declared when necessary. Camping equipment, depending on the specific items (like tents or sleeping bags), usually does not include dangerous goods, making it generally acceptable for air travel. Therefore, the recognition that certain substances like explosives and gun powder are explicitly forbidden underscores the critical emphasis on safety in aviation regulations.