Select the correct statements
(a) the value of ${\mathrm{k}}_{\mathrm{sp}}$ for a sparingly soluble salt is less than 1at 298 k
(b) Due to common ion effect the value of ${\mathrm{k}}_{\mathrm{sp}}$is unaffected
(c) The value of ${\mathrm{k}}_{\mathrm{sp}}$is unaffected by temperature
(d) For AB₂ type salt, ${\mathrm{k}}_{\mathrm{sp}}$= 4s³ [ s = solubility]