This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
Merciful anosmia is seen in: 
Select and explain. 
A. Atrophic rhinitis, B. Allergic rhinitis, C. Ethmoidal polyposis, D. Wegener's granulomatosis
A: Atrophic rhinitis
Answer: A: Atrophic rhinitis 
Explanation: In atrophic rhinitis, there is foul smell from the nose, making the patient a social outcast though the patient himself is unaware of the smell due to marked anosmia which accompanies the degenerative changes. This is called as merciful anosmia.