Diarrhoea is the frequent passage of loose, watery, soft stools with or without abdominal bloating, pressure, and cramps. People of all ages can suffer from diarrhoea; it can be caused by viruses or bacteria. Most common symptom is watery, liquid stool. Along with this, there can be abdominal cramps, fever, bloating, dehydration. etc.
Therefore, the correct answer is option B.