Which of the following roles is/are played by epididymis, vas deferens, seminal vesicles and prostate in male reproductive system of human?

Which one of the following is NOT a component of human male reproductive system ?

In the human digestive system, which one among the following is the role of the pancreas ?

Which one of the following statements best describes the role of B cells and T cells in the human body?

Which one of the following proteins is present in human hair and nails?

Which of the following is the smallest bone in the human body?