Which is the major product formed when acetone is heated with iodine and potassium hydroxide?

The major product formed in the following reaction sequence is $CH_3-CH=CH_2$ $\xrightarrow[\substack{(iii) \ CH_3-CH_2-CHO \\ (iv) \ CrO_3}]{\substack{(i) \ HBr, \text{ peroxide} \\ (ii) \ Mg}}$

$R$ formed in the following sequence of reaction is:

The reaction sequence is as follows:
Benzene + $CH_3Cl$ $\xrightarrow{Anhy. AlCl_3} A$ $\xrightarrow[(2) H_3O^+, \Delta]{(1) CrO_3 / (CH_3CO)_2O, 273-283K} B$
The incorrect statement about '$B$' is:

Which of the following ketones will $NOT$ give an enamine upon treatment with secondary amines?

$x$ is the product obtained from propanenitrile and stannous chloride in the presence of hydrochloric acid followed by hydrolysis. $y$ is the product obtained from but$-2-$ene by ozonolysis followed by hydrolysis. From the following, which product is not obtained when one mole of $x$ and one mole of $y$ react with each other in the presence of alkali followed by heating?