This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Introduction and gametogenesis., Subject name: Anatomy
Independent assoment of chromosome occurs at which level 
Select and explain. 
A. Primordial germ cells to spermatogonia, B. Spermatogonia to primary spermatocyte, C. Primary spermatocyte to secondary spermatocyte, D. Secondary spermatocyte to spermatids
C: Primary spermatocyte to secondary spermatocyte
Answer: C: Primary spermatocyte to secondary spermatocyte 
Explanation: Independent assoment: - Separation of maternal & paternal chromosomes is c/a independent assoment. It occurs in meiosis-I Meiosis I is reductional division. It is when primary spermatocyte become secondary spermatocyte. Spermatogenesis: -