Q43. Iron (III) catalyses the reaction between iodide and persulphate ions, in which A . $\mathrm { Fe } ^ { 3 + }$ oxidises the iodide ion B. $\mathrm { Fe } ^ { 3 + }$ oxidises the persulphate ion $\mathrm { C } . \mathrm { Fe } ^ { 2 + }$ reduces the iodide ion $\mathrm { D } . \mathrm { Fe } ^ { 2 + }$ reduces the persulphate ion Choose the most appropriate answer from the options given below:\\
(1) B only\\
(2) A only\\
(3) B and C only\\
(4) A and D only