Which Is an Example of a Double Dissociation for Two

Multiple Choice

Which is an example of a double dissociation for two areas of the cortex?

A) Patient A can read but not write after an injury to one region, while patient B can write but not read after an injury to the other region.
B) Patient A can read but not write after an injury to one region, while patient B can read but not write after an injury to the other region.
C) Patient A can read but not write after an injury to one region, but he can neither read nor write after an injury to the other region.
D) Patient A can neither read nor write after injuries to both regions, while patient B can write but not read after injuries to both regions.