Step 1: Concept:
Remember each ISO number by the area it serves. This is a recall question, so the quickest way is to match number and area.
Step 2: Memory list:
ISO 9000: quality management. ISO 14000: environment management. ISO 22000: food safety management. Anything else, such as ISO 11000, is not a standard for this purpose.
Step 3: Apply to the sentence:
The sentence says quality requirements and quality management of an organisation. The key word is quality management. In the list above, this belongs to ISO 9000.
Step 4: Rule out the others:
Option 1 deals with food safety, so it does not fit the word quality management. Option 2 deals with the environment. Option 3 is not tied to this area at all.
Step 5: Conclusion:
Only option 4 matches the area given in the sentence.
Final Answer:
The standard for quality management is ISO 9000, which is option 4.
\[ \boxed{4} \]
