The retentivity measures the induced magnetic field at which applied field is zero.So, Retentivity \\\\(= OA = 1.0T\\\\)Co-ercivity is the resistance of a ferromagnetic material to become demagnetized \\\\(= OC = 50 A/m\\\\).\\\\(\ herefore \\\\) Co-ercivity \\\\(= 50 A/m\\\\)At saturation magnetization; graph becomes horizontal So, saturation magnetization \\\\(= M_s = 1.5 T\\\\)option (D) is correct.