Two major entities seen in human testis $\mathrm{TS}$ are
Sertoli cells and interstitial cells
Spermatozoa and Sertoli cells
Seminiferous tubules and Leydig cells
Seminiferous tubules and Sertoli cells
$A$ : Fertilin protein is present in the egg membrane.
$R$ : It helps in agglutination reaction
Testes in rabbit are
Assertion : Old age is not an illness. It is a continuation of life with decreasing capacity for adaptation.
Reason : Cessation of mitosis is a normal genetically programmed event.
Cells of leydig are found in
Choose the correct combination of the labelling for the following structure.