For some integer q, every odd integer is of the form:
(a)q (b) q + 1
(c) 2q (d) 2q + 1
For more details, check Example 2 - Chapter 1 Class 10

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MCQs from NCERT Exemplar
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For more details, check Example 2 - Chapter 1 Class 10
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Question 4 For some integer q, every odd integer is of the form: q (b) q + 1 (c) 2q (d) 2q + 1 Every odd integer is not divisible by 2 ∴ Only option we have is 2q + 1 So, correct answer is (D)