Which is/are the correct method(s) to synthesis phenol ?

Which is/are the correct method for separating a mixture of benzoic acid, p-methylanline & phenol.

Which is the commercial method for preparation of phenol

Which of the following methods of alkane synthesis involeves the electrochemical oxidation of alkanoate ion?

Which of the following methods is/are correct for the synthesis of benzaldehyde?

Which of the following methods is/are correct for the synthesis of benzaldehyde?