From the following plot, say which is the strongest electrolyte? [Plot shows α (y-axis) vs 1/√c (x-a — AITS & Test Series Chemistry Question

Question

From the following plot, say which is the strongest electrolyte? [Plot shows α (y-axis) vs 1/√c (x-axis) with four lines labeled HA, HB, HC, and HD emanating from the origin, with HA having the steepest slope and HD having the least steep slope]