This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Symptoms & Signs , Subject name: Psychiatry
Which of the following differentiate Pseudohallucination from hallucinations? 
Select and explain. 
A. Disorder of perception, B. Absence of real stimulus, C. External objective space, D. Involuntary
C: External objective space
Answer: C: External objective space 
Explanation: Ans. C. External objective spaceHallucination/Pseudohallucination- disorder of perceptionPSEUDO-HALLUCINATIONSHALLUCINATIONSInner subjective spaceExternal objective spaceClearly delineatedClearly delineatedRemains unalteredRemains unalteredIndependent of willIndependent of will