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For some integer $m$, every odd integer can be written in the form

A$m$
B$2m + 1$
C$4m$
D$2m$
Answer & Solution
Correct answer: B. $2m + 1$
Every integer is even ($2m$) or odd ($2m+1$). **So odd integers are exactly those of the form $2m+1$.**
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