An organic compound A (C₆H₆O) gives dark green colouration with ferric chloride. On treatment with CHCl₃ and KOH, followed by acidification gives compound B. Compound B can also be obtained from compound C on reaction with pyridinium chlorochromate (PCC). Identify A, B and C.

In the given reaction

3-Bromo-2, 2-dimethyl butane $$\buildrel {{C_2}{H_5}OH} \over \longrightarrow \mathop {'A'}\limits_{(Major\,\Pr oduct)} $$

Product A is :

The structure of X is :

Ceric ammonium nitrate and CHCl₃/alc. KOH are used for the identification of functional groups present in __________ and _______ respectively.