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B
n2−32+n2+32
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C
n2−1+n2+1
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D
n2+1+n2+1
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Solution
The correct option is An2−12+n2+12 Square of any odd number can be expressed as a sum of 2 consecutive natural numbers. For example 32=9 9 can also be written as 9=4+5 9=32−12+32+12