The correct option is B - 1, 2 and 3.
[as per provisional answerkey]Why this is correct
The passage provides a comparative analysis between SARS-CoV-2 and HMPV, supporting the first three statements as follows:
Statement 1: The passage states that SARS-CoV-2 was "truly novel" in 2019, whereas HMPV has been around for "decades" and is "well-studied." This directly supports the inference that HMPV has longer documentation of studies.
Statement 2: The passage explicitly mentions that the viruses belong to "different virus families" with "fundamentally different characteristics" and that they cause "different severity of symptoms." This validates that they are different and lead to different outcomes.
Statement 3: The passage highlights that the viruses cause different severity of symptoms "particularly over the long term" and notes that HMPV has "no long-term post-viral symptoms," implying SARS-CoV-2 does. This makes long-term impact a key differentiator mentioned in the text.
Why the other options are incorrect
- Statement 4 - Seasonal specificity: This statement is factually contradicted by the passage. The text states that there is "strong seasonality seen in HMPV, unlike SARS-CoV-2," meaning seasonality is a point of difference, not a common factor.
- Option (a) - 1 and 2 only: This option is incomplete because it excludes Statement 3, which is clearly supported by the passage's discussion on long-term symptoms and severity.
- Option (c) - 3 and 4: This option is incorrect because it includes Statement 4, which is logically false based on the passage, and excludes Statements 1 and 2, which are valid.
- Option (d) - 1 and 3 only: This option is incomplete because it excludes Statement 2, which is a direct and rational inference from the passage's description of the viruses' different families and characteristics.
Key Concept
Comparative analysis and identifying points of divergence versus points of convergence in a technical text.