$$ \text { From the following pair of compounds, identify the incorrect pair in terms of the covalent character. } $$
Arrange the following compounds in the decreasing order of reactivity towards electrophilic substitution reaction.
(I) Chlorobenzene
(II) Nitrobenzene
(III) Benzene
(IV) Isopropylbenzene
With reference to vitamins and its deficiency diseases, the correct statements are:
(i) Cheilosis is due to the deficiency of Riboflavin
(ii) The deficiency of Vitamin B6 causes pernicious anaemia
(iii) Osteomalacia is due to the deficiency of Vitamin E
(iv) The deficiency of ascorbic acid causes scurvy
(v) The deficiency of Vitamin A causes xerophthalmia
Predict the final major product 'S' of the following reaction

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