Which of the following is $NOT$ a stage of sexual reproduction in fungi?

The value of $\lim_{n \rightarrow \infty} \frac{1}{n^3} \sum_{k=1}^n (k^2 x)$ is

$A$ ball is dropped from a height $h$ on a floor of coefficient of restitution $e$. The total distance covered by the ball just before the second hit is

$A$ wire fixed at the upper end stretches by length $l$ by applying a force $F$. The work done in stretching is

In a Young's double-slit experiment,the fringe width is $0.2 \, mm$. If the wavelength of light used is increased by $10\%$ and the separation between the slits is also increased by $10\%$,the fringe width will be.......$mm$.

Which of the following is $NOT$ an effect of withdrawal syndrome?