C

Bouin’s solution is the traditional and still-preferred fixative for testicular biopsy because it preserves seminiferous tubule architecture and germ-cell detail better than formalin or other agents, facilitating assessment of spermatogenesis and in-situ lesions [Ellenburg et al., 2020, PMID 31922127; Schütte, 1988, PMID 3207201].