This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
Inability to maintain penile erection to conclude coitus to orgasm and ejaculation is called - 
Select and explain. 
A. Impotence, B. Frigidity, C. Sterility, D. Bestiality
A: Impotence
Answer: A: Impotence 
Explanation: Ans. is 'a' i.e., Impotence * Impotence in male is defined as persistent inability to develop or maintain penile erection sufficient to conclude coitus to orgasm or ejaculation.* Impotence is a term generally applied to incapacity of male partner.* In females the term impotence is not used, term frigidity is used.