UPSC Prelims 2019·CSAT·Reading Comprehension·Passage Comprehension

In a study, scientists compared the microbiomes of poorly nourished and well nourished infants and young children. Gut microbes were isolated from faecal samples of malnourished and healthy children. The microbiome was "immature" and less diverse in malnourished children compared to the better developed "mature" microbiome found in healthy children of the same age. According to some studies, the chemical composition of mother's milk has shown the presence of a modified sugar (sialylated oligosaccharides). This is not utilized by the baby for its own nutrition. However, the bacteria constituting the infant's microbiome thrive on this sugar which serves as their food. Malnourished mothers have low levels of this sugar in their milk. Consequently, the microbiomes of their infants fail to mature. That in turn, leads to malnourished babies. On the basis of the above passage, the following assumptions have been made: 1. Processed probiotic foods are a solution to treat the children suffering from malnutrition due to immature gut bacteria composition. 2. The babies of malnourished mothers generally tend to be malnourished. Which of the above assumptions is/are valid?

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  1. A1 only
  2. B2 onlyCorrect
  3. CBoth 1 and 2
  4. DNeither 1 nor 2

Explanation

The passage states that "Malnourished mothers have low levels of this sugar in their milk. Consequently, the microbiomes of their infants fail to mature. That in turn, leads to malnourished babies." This directly supports assumption 2, as it establishes a causal link between malnourished mothers and their babies being malnourished. Assumption 1 is not supported by the passage. The passage describes the problem of immature microbiomes and a specific cause (lack of sialylated oligosaccharides in mother's milk), but it does not mention or suggest processed probiotic foods as a solution. This is an external inference not derivable from the given text. Therefore, only assumption 2 is valid.
Reading Comprehension: In a study, scientists compared the microbiomes of poorly nourished and well nourished infants and young children. Gut m

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