The shaded part of the number line in the given figure can also be described as

(a) (–∞, 1) ∪ (2, ∞)
(b) (–∞, 1] ∪ [2, ∞)
(c) (1, 2)
(d) [1, 2]

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Solution

Since shaded region does not include 1 and 2 but includes every value before 1 and every value after 2.
Hence, shaded region is given by (–∞, 1) ∪ (2, ∞)
Hence, the correct answer is option A.

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