Question
Five sentences related to a topic are given below. Four of them can be put together to form a meaningful and coherent paragraph. Identify the odd one out and key in the number of that sentence.
Sentences
Public-health surveillance gathers detailed data about populations in order to detect disease
patterns before they become emergencies.
The same data, however, can be repurposed in ways the original collection never contemplated,
raising questions about consent that surveillance frameworks rarely answer cleanly.
Privacy, once treated as a residual matter, has therefore moved closer to the centre of how
public-health systems are designed and justified.
Even where the original collection is uncontroversial, the absence of a clear rule against secondary
use weakens public confidence in subsequent rounds of data gathering.
Vaccination programmes succeed most reliably when they combine convenient access with
sustained community engagement by trusted health workers.
Detailed solution
Q21. Answer: 5. Sentences 1, 2, 3, and 4 form a coherent paragraph about how surveillance data, consent, and privacy are reshaping the design of public-health systems. Sentence 5 is on a public-health topic but addresses vaccination delivery and community engagement, which lies outside the surveillance-privacy argument. The oddness arises from a shift in scope and causal direction.