Which of the following cell organelles contains the maximum number of enzymes?

$\lim _{x \rightarrow \infty}\left(\frac{x+6}{x+1}\right)^{x+4}$ is equal to

The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is

$A$ vessel contains hydrogen and nitrogen gases in the ratio $2:3$ by mass. If the temperature of the mixture of the gases is $30^{\circ} C$, then the ratio of the average kinetic energies per molecule of hydrogen and nitrogen gases is $($Molecular mass of hydrogen $=2$ and molecular mass of nitrogen $=28)$

Which of the following groups of cells in the male gonad represents haploid cells?

$A$ fair coin is tossed $100$ times. The probability of getting tails an odd number of times is