Which of the following is a prokaryotic kingdom?

Acid hydrolysis of $X$ yields two different organic compounds. Which one of the following is $X$?

The position vector of a point lying on the line joining the points whose position vectors are $\hat{i}+\hat{j}-\hat{k}$ and $\hat{i}-\hat{j}+\hat{k}$ is:

The perpendicular distance from the point $(1, \pi)$ to the line joining $(1, 0^{\circ})$ and $(1, \frac{\pi}{2})$ (in polar coordinates) is:

$MTP$ is considered safe up to how many weeks of pregnancy?

The value of $x$ for the maximum value of $\sqrt{3} \cos x + \sin x$ is .....$^o$