What is formed by the reaction of $p$-toluidine with chloroform and alcoholic $KOH$?

Identify the major product of the following Hofmann elimination reaction: $[\text{cyclohexyl-}N^{+}(CH_3)(CH_2CH_3)(n\text{-Bu})]OH^{-} \xrightarrow{\Delta} \text{Major product}$

The major product of the following reaction is:

Which of the following is the strongest Bronsted base?

Chloroform when treated with aniline and alcoholic $KOH$ gives:

What is the major product formed when $C_6H_5CH_2NH_2$ reacts with nitrous acid $(HNO_2)$?