This is a basic circuits problem Please provide a detailed s

This is a basic circuits problem, Please provide a detailed solution to support the answer.

An N channel MOSFET is in the saturation region unless the following is true (you may answer this question without showing any work). i_D = k(v_GS - V_to)^2 v_DS greaterthanorequalto v_DS - V_to i_D is independent of v_DS v_DS Lessthanorequalto v_GS - V_to none of the other answers

Option b is the true