Item analysis of pharmacology multiple-choice questions used in the semester-I examination for second-year undergraduate medical students at Khesar Gyalpo University of Medical Sciences, Bhutan: a cross-sectional  study. Bhutan Health Journal [Internet]. 2026 May 15 [cited 2026 Jun. 13];12(1):6. Available from: https://www.bhj.com.bt/index.php/bhj/article/view/699