
Consider the following reaction sequence.
Consider the reaction given below:

\(\text{A gives positive Fehling's test. Choose the correct relation}\).
Write the correct order of rate of reaction of following compounds with $PhN_2Cl$
P: $N,N$-dimethylaniline
Q: $N,N$-dimethyl-3-methylaniline
R: $N,N$-dimethyl-2,6-dimethylaniline



Consider the following reaction sequence.

Foot of perpendicular from origin on a line passing through $(1, 1, 1)$ having direction ratios $\langle 2, 3, 4 \rangle$, is: