4.34歲男性主訴右耳聽力不佳,未曾接受過任何耳科手術,鼓室檢查結果如下圖,其右耳最有可能為:
(A)耳硬化症(otosclerosis) (B)急性中耳炎(acute otitis media) (C)鼓膜穿孔(eardrum perforation) (D)漿液性中耳炎(otitis media with effusion)