The increasing order of the acidity of the $$\alpha $$-hydrogen of the following compounds is :

Which of the following derivatives of alcohols is unstable in an aqueous base?

The major product [C] of the following reaction sequence will be :

An organic compound (A) (molecular formula C₆H₁₂O₂) was hydrolysed with dil. H₂SO₄ to give a carboxylic acid (B) and an alcohol (C). ‘C’ gives white turbidity immediately when treated with anhydrous ZnCl₂ and conc. HCl. The organic compound (A) is :