Which of the following compounds yields propanone upon dehydrogenation?

Which of the following reactions is not feasible?

Most acidic alcohol out of the following compounds is

The major product $[B]$ in the following reaction is:
$CH_3-CH_2-CH(CH_3)-CH_2-O-CH_2-CH_3$ $\xrightarrow[Heat]{HI} [A] (alcohol)$ $\xrightarrow[\Delta]{H_2SO_4} [B]$

Which of the following is a secondary benzylic alcohol?

Explain the effects and remedies when an alcoholic consumes denatured alcohol.