Pseudoscience is the practice or theories which is based on the belief system and not on the scientific methods. The personal opinions based on the belief system are used as facts and evidence support the theories.
In the given question, the pills were recommended by the doctors to heavy patients to lose weight. The pills were recommended on the basis that it reduced the weight of some patients which can be considered as experimental samples.
The pill was not used on the persons with normal weight which could be used as a reference to the experimental samples. Thus, the selected option is the correct answer.
