$\begin{array}{1 1}\text{(a) (i)Phenol on reaction with concentrated $HNO_3$ in the presence of conc. $H_2SO_4$ results in the formation of picric acid (ii) 2-Methyl propene can be obtained from 2-methyl propanol by the reaction of the later with alc. KOH}\\\text{(b) (i)Phenol on reaction with concentrated $HNO_3$ in the presence of conc. $HCl$ results in the formation of picric acid (ii) 2-Methyl propene can be obtained from 2-methyl propanol by the reaction of the later with alc. NaOH}\\\text{(c) (i)Phenol on reaction with concentrated conc. $HCl$ results in the formation of picric acid (ii) 2-Methyl propene can be obtained from 2-methyl propanol by the reaction of the later with alc. NaOH}\\\text{(d) None of the above}\end{array} $
