Answer is (3) aqueous NaHCO3
Toilet cleaning liquid has about 10.5% w/v HCl; to neutralise its affect aqueous NaHCO3 is used while NaOH is avoid for this purpose because its highly corosive in nature and can burn body.
Aliter :
Dil HCl is generally used as toilet cleaner
NaHCO3 is used to neutralize it