gastro intestinal disturbances is caused by 
a) chromium
b) cadmium
​c) sodium
d) selenium

Dear student, 

Although chromium, cadmium and selenium all of them are heavy metals leading to health disorders.
But, the answer is option (d) Selenium, which leads to gastro-intestinal disorders. The symptoms include foul breath smell or odour( also called garlic breath), vomiting, nausea.

Regards.