Pathology General d3b2c289 The most common site and type of metaplasia are : A Respiratory tract epithelium, Columnar metaplasia B Respiratory tract epithelium, Squeamous metaplasia C Esophagus, Squeamous metaplasia D Esophagus, Columnar metaplasia High-Yield Explanation As respiratory tract is exposed to chronic irritation due to dust, Smoke etc, it undergoes squeamous metaplasia ,