The mental disorders have not complete cure. However, the availability of active and effective treatment strategies to treat this mental disorder is very low prior to 1970s.
The rate of clinical research is higher during last few decades finally make available many FDA approved drugs to treat these mental diseases. However, many mental treatment molecules have medical noncompliance still under investigation till today.
Thus, the options (b), (a) and (d) are incorrect.
The rate of clinical research is higher during last few decades finally make available many FDA approved drugs to treat these mental diseases.
Therefore, the correct option is – c). Effective treatments and medications had yet to be discovered.