一对夫妇，妻子患白化病，其父为色盲；丈夫正常，其母患白化病。

一对夫妇，妻子患白化病，其父为色盲；丈夫正常，其母患白化病。预测他们的子女同时患有两种病的几率 ( )

A.1/2 B.1/4 C.1/8 D.1/16

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一对夫妇，妻子患白化病，其父为色盲；丈夫正常，其母患白化病。

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