According to Kohlrausch's law of independent migration of ions, at infinite dilution

Aeach ion makes a definite contribution to $Λ_{m}^{\circ}$ of the electrolyte, independent of the nature of the other ion present
Bthe molar conductivity of every electrolyte becomes zero
Cthe conductivity of all electrolytes becomes equal
Dthe molar conductivity varies linearly with $c$

Answer: A

Kohlrausch's law states

Λ_{m}^{\circ} = ν_{+} λ_{+}^{\circ} + ν_{-} λ_{-}^{\circ}

: at infinite dilution the ions move independently and each has a characteristic limiting conductivity. At infinite dilution

Λ_{m}

reaches its maximum value

Λ_{m}^{\circ}

, not zero (it is

κ

that tends to zero). Linear variation with

c

is the Debye-Huckel-Onsager equation, not Kohlrausch's law.