Leydig cells are derived embryologically from
Ans. is 'a' i.e., Mesoderm of gonadal ridge Testosterone producing cells, called leyding cells, develop from mesoderm of the gonadal ridge and are located between sex cords.They produce testosterone by week 8.
Mesoderm of gonadal ridge
Endoderm of Genital tubercle
Germ cells
None of the above