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B
Humans
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C
Lizards
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D
Both A and B
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Solution
The correct option is D Both A and B Sexual dimorphism is the differences in appearance between males and females of the same species. These differences are observed in the organisms which have two different sexes as males and females and called unisexual organisms. The arthropods and humans are unisexual organisms. The lizards are the reptiles, which are bisexual.