Prolonged constipation may cause:

The pathogens responsible for disorders of the digestive system are:

$A$ : In acute constipation,purgatives containing magnesium salts are generally used.
$R$ : The osmotic effect of $Mg^{2+}$ in the intestinal lumen prevents water reabsorption from the intestine. $Mg^{2+}$ increases the solute concentration in the intestinal lumen because $Mg^{2+}$ is absorbed very slowly.

Which of the following characteristics is associated with pernicious anemia?

Inflammation of the intestine or colitis may be the cause of:

Select the correct option regarding disorders of the digestive system.