Which of the following groups increases the basic strength of substituted aniline?

Which of the following possess powerful mustard smell (and are called mustard oils)?

For the transformation shown below,the reagent used is:

In the given reaction,the product $E$ is:

What will be the structure of product $T$ in the following reaction?

Assertion: Only a small amount of $HCl$ is required in the reduction of nitro compounds with iron scrap.
Reason: $FeCl_2$ formed gets hydrolysed to release $HCl$ during the reaction.