• Escherichia coli as an Indicator of Fecal Contamination:
• Bacteriological Water and Milk Standards:
• Escherichia coli is an obligate inhabitant of the gastrointestinal tract of warm-blooded vertebrates.
• Its presence in pasteurized milk or processing water provides unambiguous, direct proof of recent fecal contamination and potential presence of pathogenic enteric bacteria and viruses.
• Conclusion: E.coli (Option 1).

Correct option: (1) E.coli

• The PDCA Continuous Improvement Cycle (Deming / Shewhart Cycle):
• Full Form:
• Plan-Do-Check-Act:

• Plan: Identify an opportunity and formulate a strategy.
• Do: Implement the plan on a small pilot scale.
• Check: Analyze results, measure performance, and verify outcomes.
• Act: Standardize successful changes or iterate if objectives were not met.
  • Conclusion: Plan-Do-Check-Act (Option 2).

Analyzing the statements in relation to Milk constituents, their normal contents and physical and chemical nature:

The correct option is Option 4: 1SO 9000 standards are meant for food safety.