If a person is able to speak in phrases that sound fluent, yet lack meaning, then he would probably be suffering from-

The correct option is B Wernicke's aphasia
Wernicke's area is the region located in the temporal lobe on the left side of the brain and is responsible for the comprehension of speech. It is important for language development.
Broca's area is related with the production of speech.
Hemiplegia means one side of the body gets paralysed due to injury of spinal cord or brain damage.
Aplasia is a birth defect where an organ or tissue is largely absent.

Thus, if a person is able to speak in phrases that sound fluent, yet lack meaning, then he would probably be suffering from- Wernicke's aphasia.