When 0.1 M Pb(NO₃)₂ solution is titrated with 0.1 M KI solution, then what will be the osmotic pressure (in atm) of the solution when the equivalence point is reached at 300 K?

a) 2.0 atm
b) 2.5 atm
c) 3.0 atm
d) 3.5 atm