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(C) The symptoms described, such as retarded physical, psychomotor, and mental development, along with a broad palm and a characteristic palm crease (

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Down's syndrome

Vedclass · Answer

(C) The symptoms described, such as retarded physical, psychomotor, and mental development, along with a broad palm and a characteristic palm crease (simian crease), are classic clinical features of $Down's syndrome$.$Down's syndrome$ is a chromosomal disorder caused by the presence of an additional copy of chromosome number $21$ (trisomy of $21$).Therefore, the correct option is $C$.

- Physical, psychomotor and mental development is retarded.
- Palm is broad with characteristic palm crease, these symptoms show....

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- Physical, psychomotor and mental development is retarded.- Palm is broad with characteristic palm crease, these symptoms show....