Which of the following is the family of sunflower?

Two circular coils $A$ and $B$ are facing each other as shown in the figure. The current $i$ through coil $A$ can be altered.

In alcohol fermentation,

At $25^{\circ}C$,the solubility product of $Mg(OH)_2$ is $1.0 \times 10^{-11}$. At what $pH$ value will the precipitation of $Mg^{2+}$ ions begin in a solution containing $0.001 \ M \ Mg^{2+}$ ions?

The point collinear with $(1, -2, -3)$ and $(2, 0, 0)$ among the following is

The number of integral values of $k$ for which the equation $7 \cos x + 5 \sin x = 2k + 1$ has a solution is: