Fill in the blanks with the most appropriate option:-

Current treatment of schizophrenia is based on __________, clinical research and experience.

both

The correct option to fill in the blanks is both.

The sentence "Current treatment of schizophrenia is based on both, clinical research and experience" means that the current treatment of schizophrenia is based on both clinical research and the experience of doctors and patients. The word "both" is used to indicate that two things are being considered together. The other options are not appropriate because they do not convey the same meaning.

• The word "none" is used to indicate that there is nothing being considered. For example, "The current treatment of schizophrenia is based on none of the above."
• The word "either" is used to indicate that one of two things is being considered. For example, "The current treatment of schizophrenia is based on either clinical research or experience."
• The word "neither" is used to indicate that neither of two things is being considered. For example, "The current treatment of schizophrenia is based on neither clinical research nor experience."