Step 1: Understanding the Concept:
Canning thermal process calculations, can defect inspection, and microbial canning spoilage.
Step 2: Detailed Explanation:
Matching canning technology concepts in List I with parameters/pathogens in List II:
- A. Ends of a Normal Can: Under normal vacuum conditions, can ends must be IV. Concave or flat (swollen convex ends indicate microbial gas spoilage/flippers/swells).
- B. Flat Sour Spoilage: Thermophilic non-gas acid spoilage caused by I. {Bacillus stearothermophilus (Geobacillus stearothermophilus).
- C. Neurolytic Toxin (Botulinum Neurotoxin): Potent lethal neurotoxin produced by anaerobic endospore-forming II. {Clostridium botulinum.
- D. General Method of Process Calculation: Developed historically in 1920 by III. Bigelow (Graphical integration method for thermal sterilization lethality $F_0$).
Matching sequence: A-IV, B-I, C-II, D-III.
Step 3: Final Answer:
Therefore, the correct matching is A-IV, B-I, C-II, D-III, corresponding to option (A).