From which of the following is quinine obtained?

If $\frac{9}{(x - 1)(x + 2)^2} = \frac{A}{x - 1} + \frac{B}{x + 2} + \frac{C}{(x + 2)^2}$,then $A - B - C = $

The maximum value of $xy$ subject to $x+y=7$ is

In $Bryophyta$,the adult plant body is

In the figure below, what is the potential difference between the points $A$ and $B$ and between $B$ and $C$ respectively in steady state?

$A$ tangent galvanometer has a coil of $25$ turns and a radius of $15 \, cm$. The horizontal component of the earth's magnetic field is $3 \times 10^{-5} \, T$. The current required to produce a deflection of $45^o$ in it is.....$A$