Thousands of years ago, some people began dairy farming. This coincided with a number of mutations in a particular gene that resulted in these people developing the ability to digest dairy milk. Based on the given passage, which of the following can be inferred? A. All human beings can digest dairy milk. B. No human being can digest dairy milk. C. Digestion of dairy milk is essential for human beings. D. In human beings, digestion of dairy milk resulted from a mutated gene.

GATE 2024 · General Aptitude · Statements Follow · medium

Answer: D. In human beings, digestion of dairy milk resulted from a mutated gene.

1. Eliminate Option A: All human beings can digest dairy milk: The passage says 'some people' developed this ability due to mutations. It does not say all humans can digest dairy milk. Option A is too broad.
2. Eliminate Option B: No human being can digest dairy milk: The passage explicitly says some people developed the ability to digest dairy milk. Option B directly contradicts the passage.
3. Eliminate Option C: Digestion of dairy milk is essential for human beings: The passage says nothing about dairy digestion being essential or necessary for humans. 'Essential' introduces a claim not present in the passage.
4. Confirm Option D: Digestion of dairy milk resulted from a mutated gene: The passage states: mutations in a particular gene resulted in these people developing the ability to digest dairy milk. Option D rephrases this directly: 'digestion of dairy milk resulted from a mutated gene'. This is exactly what the passage asserts.