Choose the Odd One Out:
1. Testes, Prostate gland, Seminal vesicle, Cowper’s gland.
2. Vas deferens, Fallopian tube, Epididymis, Cowper’s gland.
3. Testis, Penis, Oviduct, Seminiferous tubules.
4. Oxytocin, Insulin, Prolactium, Progesterone.
5. Oestrogen, Progesterone, Testosterone, Prolactin.
6. Larynx, Pancreas, Testis, Ovary.