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Odd function must pass through origin so first two options are not correct.
Odd function must be rotational symmetry around origin. So last option is not correct.
So answer is C.
By adding two positives together, or a big positive number with a small negative number.
Sqrt -13 = sqrt13 i
sqrt -26 = sqrt2 * sqrt13i
sqrt-13 * sqrt -26 = sqrt2 * 13* i^2 = -13 sqrt2 (because i^2 = -1)
answer is -13 sqrt2