Which of the following statements about Jacobson’s organ is correct?

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It serves as an additional olfactory sensory structureIt has an ellipsoid or cigar-like shapeIt degenerates after four months of fetal developmentAll of the above

Explanation

Jacobson’s organ functions as an auxiliary olfactory organ, is ellipsoid or cigar-shaped, and typically undergoes degeneration after approximately four months of intrauterine life. Therefore, all the given statements are accurate.