Which of the following is responsible for flat sour spoilage?

Correct option is B

Correct Answer: (b) Bacillus stearothermophilus
Explanation:
→ Flat-sour spoilage is caused by thermophilic spore-forming bacteria, mainly Bacillus stearothermophilus.
→ It produces acid without gas → cans appear normal externally.
Information Booster:
→ Common in improperly cooled canned foods.
Additional Information (Other Options):
(a) Causes botulism, not flat-sour.
(c), (d) Not associated with flat-sour spoilage.