Difficulty: Easy
Correct Answer: These are diseases caused by bacteria
Explanation:
Introduction / Context:The three names listed are human diseases. The task is to identify the common scientific classification that best describes all of them.
Given Data / Assumptions:
Concept / Approach:Confirm that all belong to the same etiological class (bacterial). Avoid broader/ambiguous choices.
Step-by-Step Solution:
Map each disease → causative agent type.All three are bacterial in origin → select the explicit statement.Verification / Alternative check:Cross-check that none of the three is viral/plant-related/limited to the stomach.
Why Other Options Are Wrong:
Plant pests — incorrect domain.Pathogens — too broad; the diseases are not pathogens themselves.Infections of stomach — diphtheria is respiratory; anthrax affects skin/lungs/GI variably.Viral diseases — wrong agent class.Common Pitfalls:Choosing an over-broad classification (“pathogens”) rather than the precise shared cause.
Final Answer:These are diseases caused by bacteria
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