The correct order of stability of given carbocation is :

The density of NaOH solution is 1.2 g cm^$$-$$3. The molality of this solution is _____________ m. (Round off to the Nearest Integer)

[Use : Atomic mass : Na : 23.0 u, O : 16.0 u, H : 1.0 u, Density of H₂O : 1.0 g cm^$$-$$3]

The conductivity of a weak acid HA of concentration 0.001 mol L^$$-$$1 is 2.0 $$\times$$ 10^$$-$$5 S cm^$$-$$1. If $$\Lambda _m^o$$(HA) = 190 S cm² mol^$$-$$1, the ionization constant (K_a) of HA is equal to ______________ $$\times$$ 10^$$-$$6. (Round off to the Nearest Integer)

1.46 g of a biopolymer dissolved in a 100 mL water at 300 K exerted an osmotic pressure of 2.42 $$\times$$ 10^$$-$$3 bar.

The molar mass of the biopolymer is _____________ $$\times$$ 10⁴ g mol^$$-$$1. (Round off to the Nearest Integer)

[Use : R = 0.083 L bar mol^$$-$$1 K^$$-$$1]