Which of the following amino acid will give violet coloured complex with neutral ferric chloride solution?

Consider the following organic reaction sequence. Choose the final product $(X)$ from the following (consider the major product in all intermediate reactions)

The number of compounds from the following which can undergo reaction with $\mathrm{Br}_2 / \mathrm{KOH}$ (alcoholic) to give respective products and these respective products can also be obtained separately by Gabriel phthalimide reaction is :

Arrange the following compounds according to increasing order of boiling points.

$$ \mathrm{n}-\mathrm{C}_4 \mathrm{H}_9 \mathrm{OH}(\mathrm{~A}), \mathrm{n}-\mathrm{C}_4 \mathrm{H}_9 \mathrm{NH}_2(\mathrm{~B}), \mathrm{n}-\mathrm{C}_4 \mathrm{H}_{10}(\mathrm{C}) \text { and } \mathrm{C}_2 \mathrm{H}_5 \mathrm{NHC}_2 \mathrm{H}_5(\mathrm{D}) . $$