Aform of cognitive disorder involving generalized progressive deficits in a person's memory, ability to communicate, judgment, and motor coordination is referred to as

The answer is that it referred to as "Dementia".
Dementia is not a particular disease,it is a gathering of conditions portrayed by weakness of at least two brain functions, for example, loss of memory and judgment. Indications incorporate absent mindedness, restricted social aptitudes and thinking capacities so impeded that it interacts with day by day working. Drug and treatments may be helpful to overcome side effects.

Ithink the answer you are looking for is (b).