Which of the following statements is true of the differences between propofol and ketamine?
a) Propofol produces conscious sedation, whereas ketamine leads to a loss of consciousness.
b) Ketamine relaxes skeletal muscles, but propofol does not.
c) Propofol produces good analgesia, but ketamine does not.
d) Ketamine induces hallucinations, whereas propofol leads to euphoria.