545. Of the twin supernovas, the most recently discovered is the largest, but it is the small one that has irrevocably altered astronomists’ ideas about the origins of the universe.

(A) the most recently discovered is the largest, but it is the small one
(B) the one most recently discovered is the largest, but it is the small one
(C) the most recently discovered is larger, but it is the smaller
(D) the more recently discovered one is the large one but the small one
(E) the more recently discovered is the larger, but it is the smaller one

Solution:

Comparison + Awkwardness

“twin supernovas” mean two supernovas and therefore, comparative form (more/larger)of comparison must be used instead of superlative (most/largest).
Hence, A, B, and C are incorrect.
D: “is the large one but the small one” is ambiguous and awkward.
E: Comparative degree is used (more recently…larger…smaller) and hence, E is the best choice.

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