Which of the following reactions can be used to convert an unsaturated ketone into an unsaturated hydrocarbon?

For the reaction given below:
The compound which is not formed as a product in the reaction is a:

Some organic compounds possess fragrance and taste. Their names are given in Column-$I$,structures in Column-$II$,and their sources in Column-$III$. Match Column-$I$ with Column-$II$ and Column-$III$.

Column-$I$ (Name)	Column-$II$ (Structure)	Column-$III$ (Source)
$(A)$ Vanillin	$(i)$ $C_6H_4(OH)CHO$ (ortho)	$(p)$ From cinnamon
$(B)$ Salicylaldehyde	$(ii)$ $C_6H_5CH=CHCHO$	$(q)$ From seeds of vanilla
$(C)$ Cinnamaldehyde	$(iii)$ $C_6H_3(OH)(OCH_3)CHO$	$(r)$ From meadow sweet

Which of the following on reaction with Grignard reagent followed by hydrolysis forms a tertiary alcohol?

$A$ carbonyl compound $X$ $(C_8H_8O)$ gives a yellow precipitate with $NaOI$. The hemiacetal of $X$ with methanol/dry $HCl$ is:

Which of the following will give $-ve$ Tollen's but $+ve$ Iodoform test?