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Para-jumbles 33 / 100

a. Unlike ordinary baryonic matter, dark matter does not interact with electromagnetic forces, meaning it neither emits nor absorbs light, making direct observation impossible.
b. The existence of dark matter is one of the most perplexing mysteries in modern astrophysics, positing that a substantial portion of the universe's mass remains invisible and undetectable by conventional means.
c. Its presence is primarily inferred through its gravitational effects on visible matter, such as the anomalous rotation curves of galaxies and the gravitational lensing of distant objects.
d. Consequently, ongoing experiments worldwide are attempting to detect these elusive particles directly, hoping to unlock fundamental insights into the composition and evolution of the cosmos.

These sentences, when properly sequenced, form a coherent paragraph. Which of the options best outline their correct order?

1. c, b, d, a

2. b, a, c, d

3. b, c, a, d

4. a, d, c, b

Correct Answer: 3 (b, c, a, d)
To solve "Sentence Rearrangement" or "Para-jumble" tasks, look for the logical flow of ideas:
Step 1 (Introduction): Sentence (b) serves as the best introduction as it defines dark matter and establishes it as a fundamental mystery in astrophysics, setting the stage for the rest of the paragraph.
Step 2 (Elaboration): Sentence (c) logically follows (b) by explaining how scientists infer the existence of this 'invisible and undetectable' substance, specifically through its gravitational effects. The pronoun "Its" in (c) clearly refers to dark matter introduced in (b).
Step 3 (Secondary Factor): Sentence (a) elaborates further on why dark matter is invisible and undetectable, contrasting it with ordinary matter and explaining its lack of interaction with electromagnetic forces. This explains the "undetectable by conventional means" phrase from (b) and builds upon the nature of dark matter discussed implicitly in (c).
Step 4 (Conclusion/Result): Sentence (d) acts as a fitting conclusion, starting with "Consequently," indicating the result or next step arising from the mystery and the elusive nature of dark matter: the global effort to detect these particles.

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