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B
Albumen
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C
Malonylacetic acid
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D
Homogentisic acid
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Solution
The correct option is D Homogentisic acid
Alkaptonurics or alkaptonuria (AKU) is a disorder of autosomal recessive inheritance. It is a rare disorder. It is caused by a mutation in a homogentisate 1,2-dioxygenase (HGD) gene that results in the accumulation of homogentisic acid (HGA). The patients with alkaptonuria pass dark urine which upon standing turns black in colour.