Go through the following statements regarding the disorders of the digestive system. Choose the correct statements and select the appropriate option from the codes given below:
$I.$ Indigestion is caused by the poor supply of digestive enzymes,overeating,anxiety,and a lot of junk food.
$II.$ Constipation,an irregular movement of the bowel,is caused due to poor habits,a fiberless diet,emotional stress,and certain drugs.
$III.$ Indigestion can be caused by milk of magnesia.
$IV.$ Ejection of stomach content is controlled by the hypothalamus of the prosencephalon.

• A
  All statements are correct.
• B
  All statements are incorrect.
• C
  $I$ and $II$ statements are correct.
• D
  $III$ and $IV$ statements are correct.