The answer is c) Wrap a fire blanket around a standing person.
Explanation for each option:
a) Stop them and smother the fire by rolling them on the floor: This is a correct action. The "Stop, Drop, and Roll" technique is a well-known method to extinguish flames on a person's clothing by depriving the fire of oxygen.
b) Drag them under a safety shower: This is also a correct action. A safety shower can quickly douse flames and cool down burns, helping to extinguish the fire and reduce injury.
c) Wrap a fire blanket around a standing person: This is incorrect. Wrapping a fire blanket around a standing person can trap heat and flames against their body, potentially causing more harm. It's important to lay the person down and then wrap them to smother the fire effectively.
d) Splash them with a bucket of water: This is generally a correct action, especially if the fire is small and water is readily available. Water can help extinguish flames and cool burns, although it may not be suitable for all types of fires (e.g., oil or electrical fires).
In summary, the action you should NOT do is c) Wrap a fire blanket around a standing person.