Final answer:
Each industrial plant, bulk plant, and distributing point must have a fire extinguisher with a minimum capacity and a B:C rating. The specific capacity is not provided in the question.
Step-by-step explanation:
In regards to fire safety regulations, each industrial plant, bulk plant, and distributing point is required to have a fire extinguisher with a minimum capacity specified by the regulations. This fire extinguisher should also have a B:C rating, which indicates the suitability of the extinguisher for certain types of fires.
Unfortunately, the question does not provide the specific minimum capacity required for the fire extinguisher with a B:C rating. It would be best to refer to local fire safety regulations or guidelines to find the exact capacity required for such situations.