Assertion(A): E.coli, Shigella and Salmonella are all responsible for diarrhoeal disease.
Reason(R): Dehydration is common to all types of diarrhoeal diseases and adequate supply of fluids and electrolytes should be ensured.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.