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Para-jumbles 12 / 100

a. Its presence, however, is inferred from its gravitational effects on visible matter, such as the rotation curves of galaxies and the gravitational lensing of distant objects.
b. Our current cosmological model suggests that roughly 27% of the universe's mass-energy content is comprised of an enigmatic substance known as dark matter.
c. Despite decades of intensive research, including underground experiments and space-based observatories, the fundamental nature of dark matter particles remains one of the most significant unsolved mysteries in physics.
d. This hypothetical form of matter does not interact with light or other electromagnetic radiation, rendering it invisible to direct observation through conventional telescopes.

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

1. b, d, a, c

2. b, a, d, c

3. d, b, a, c

4. a, b, d, c

SPLIL---

Correct Answer: 1 (b, d, a, c)
To solve "Sentence Rearrangement" or "Para-jumble" tasks, look for the logical flow of ideas:
Step 1 (Introduction): Sentence (b) is the most effective opening. It introduces the central concept of "dark matter" and its significant proportion in the universe, setting the stage for further discussion.
Step 2 (Elaboration): Sentence (d) logically follows (b). The phrase "This hypothetical form of matter" directly refers to the "dark matter" introduced in (b), and it elaborates on its primary characteristic: its invisibility due to lack of interaction with light.
Step 3 (Secondary Factor): Sentence (a) follows (d). It acts as a contrast to the invisibility mentioned in (d) using the connector "however," explaining how, despite being invisible, its presence is inferred through gravitational effects. This provides the evidence for its existence.
Step 4 (Conclusion/Result): Sentence (c) serves as the conclusion. It summarizes the current state of knowledge about dark matter, highlighting that despite ongoing research (building upon the inference discussed in a), its fundamental nature remains an unsolved mystery.

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