Which one of the following hormones increases the heartbeat in mammals?

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

Which one of the following salts is found in maximum amount in the human bones?

Which of the following hormones is secreted by the Beta cell of Islet of Langerhans of Pancreas?

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

Which one of the following statements is correct?