Unlike a psychiatrist, who holds a medical degree and is consequently allowed to prescribe medicines to treat mental illnesses, a doctoral degree is held by a psychologist, which allows him to use only non-medical means to treat patients.
A. Unlike a psychiatrist, who holds a medical degree and is consequently allowed to prescribe medicines to treat mental illnesses, a doctoral degree is held by a psychologist, which allows
B. Unlike a psychiatrist who holds a medical degree and is consequently allowed to prescribe medicines to treat mental illnesses, the doctoral degree of a psychologist allows
C. Unlike that of a psychiatrist, which allows the prescription of medicines to treat mental illnesses, a psychologist's degree allows
D. In comparison to a psychiatrist, whose medical degree allows the prescription of medicines to treat mental illnesses, a psychologists doctoral degree allows
E. A psychiatrist holds a medical degree and is consequently allowed to prescribe medicines to treat mental illnesses, but a psychologist holds a doctoral degree which allows
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