Choose the number of correct statements. (a) Measurement of molar conductivity was utilized by Werner lo characterise the cobalt (lll)-ammine compounds. (b) The neutral ligands can only satisfy the secondary valence but the anions may satisfy both the primary and secondary valencies. (c) The secondary valencies are directional to provide the specific geometry of a complex but the primary valencies have nothing to do with the geometry of coordination compounds. (d) The oxyantons, amtnopoly earboxylates, cysteine, histidine etc, can show the flexidentate character. (e) The concept of eo-ordtnatton number in co-ordination compounds is different from that in the ionic solids. (f) In determining the co-ordination number in co-ordination compounds, the number of x-bonde formed by ligands with metal centre has no role. (g) Oleflns can act both as monodentate and bidentate ligands depending on the conditions. (h) Tho disttnction between the perfect and imperfect. complexes i!, arbitrary. (i) u-bond is a special type of $\mathrm{\sigma }$-bond