Answer:
b. dichotic listening.
Step-by-step explanation:
Dichotic listening is defined as a psychological experiment or test which is commonly applied to investigate the selective attention as well as the lateralization of our brain function within the auditory system. It is used in the fields of neuroscience and cognitive psychology as well.
This test is used to evaluate the central auditory processes of the binaural integration and separation.
Thus in the context, a student sitting right to me is talking to one of his friend while I am trying to focus on a comment by a student who is sitting on my left resembles an experimental setup called as the dichotic listening model.
Hence the correct option is (b).