What is the function of the interstitial cells in the testes?

Explanation:

The interstitial cells are found in the testes of males. These cells are responsible for the production and secretion of androgens such as male hormone, testosterone.

The release of control testosterone is under the control of luteinizing hormone (LH) which is secreted from pituitary.

The hormone testosterone produced by interstitial cells, acts on sustentacular cells and it's function is to promotes spermatogenesis.

answer; i believe the correct answer is (replication is not conservative);

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.