Answer:
Option A
Explanation:
Remember than while finding conjugate aCid add a H+ to the base or compound
.Here
Water+H+
Option A
Answer:
H_2O and H_3O+
Explanation:
H_3O+ or hydronium ion can be referred as H+ also .
If one H+ is deducted from H_3O+ then it yields as H_2O
So it's conjugate of water