ii. The key step in the synthesis of ibuprofen in your factory is the reaction of chloroalkane (A) with cyanide ion, as shown in the reaction scheme below. (6 marks) H3C H H3C NaCN CH3CH2OH H H3C) H Ar CI Ar CN Ar CN A B Key: Ar = benzene ring a. Select the major product of this reaction (1 mark) b. Draw the SN2 mechanism for this reaction including the transition states (3 marks) c. Is this a reasonable SN2 reaction? Briefly explain by clearly stating at least 2 reasons. (2 marks)