Match the reaction is List I with appropriate option in List – II

P) is an electrophilic addition and forms a dl pair.Q) is an electrophilic aromatic substitution and also is known as diazo-coupling reactionR) is an electrophilic aromatic substitution and gives dl pair as the arbocationic carbon turns into a chiral centre in the product.S) is a nucleophilic addition and gives a dl pair.