Oral rehydrate solution is one of the following.. NaCl + K citrate + Na citrate + glucose

Oral rehydrate solution is one of the following:
a- NaCl + K citrate + Na citrate + glucose.***
b- Na citrate + KCl + NaCl.
c- Na citrate + KCl + NaCl.
d- NaCl + KCl + NaHCO3 + citric acid.