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B
Molluscs
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C
Insects
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D
None of the above
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Solution
The correct option is B Insects Pteridines are also regarded as excretory products, which are important pigments in insects. The synthesis of pteridines resembles that of uric acid. In some insect (Oncopeltus) traces of pteridines are excreted in the feces, whereas in butterflies (Pieris brassicae) pteridines are deposited in wings, fat body, etc. Only traces of it are excreted in urine.