The figure gives experimentally measured B vs. H variation in a ferromagnetic material. The retentivity, co-ercivity and saturation, respectively, of the material are:
(1) 150 A/m, 1.0 T and 1.5 T
(2) 1.0 T, 50 A/m and 1.5 T
(3) 1.5 T, 50 A/m and 1.0 T
(4) 1.5 T, 50 A/m and 1.0 T