This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other Key Definitions & Concepts, Subject name: Social & Preventive Medicine
A 27 years old male unable to perform Sexual activity is:- 
Select and explain. 
A. Disease, B. Impairment, C. Disability, D. Handicap
C: Disability
Answer: C: Disability 
Explanation: Spectrum of Disease: Disease - Any abnormal condition of an organism that Impairs function of a person. Impairment - Loss of anatomical / physio/ psycho function. Disability - Unable to carry out ceain activities considered normal for his age,sex etc. Handicap - Unable to perform social role.