To solve this problem, we need to identify which statements are true for spermatogenesis but not for oogenesis. Let's analyze each statement:$\newline \bullet$(a) It results in the formation of haploid gametes:$\newline$ - Both spermatogenesis and oogenesis result in haploid gametes, so this statement is true for both processes.$\newline \bullet$(b) Differentiation of gamete occurs after the completion of meiosis:$\newline$ - In spermatogenesis, spermatids differentiate into spermatozoa after meiosis is complete.$\newline$ - In oogenesis, the primary oocyte completes meiosis I to form a secondary oocyte and a polar body, and meiosis II is completed only if fertilization occurs.