Answer:
A) Ka1
Explanation:
Dissociation constant of an acid shows the amount of the acid dissociated to furnish hydrogen ions.
The more the dissociation constant, the more stronger is the acid.
Generally for a polyprotic acids,
The first dissociation constant, Ka1 is large. After the dissociation of the first proton, the dissociation of more protons is suppressed as the equilibrium shifts to the acid side.
