Which organ is responsible for the storage of blood to be released during sudden blood loss?

Which of the following organs is known as the blood bank of the body?

The process of blood clot formation within the circulatory system is known as:

What is the correct order of events occurring in blood clotting?
$I.$ Conversion of fibrinogen to fibrin
$II.$ Formation of clot
$III.$ Thromboplastin formation
$IV.$ Conversion of prothrombin to thrombin
Choose the correct option.

Statement-$I$ :- The body has the ability to alter the stroke volume as well as heart rate and thereby the cardiac output.
Statement-$II$ :- During each cardiac cycle two prominent sounds are produced which can not be easily heard through a stethoscope.

Which of the following is a characteristic of pernicious anemia?