The time taken by a photoelectron to come out after the photon strikes is approximately

$A$ marine cartilaginous fish that can produce electric current is

Which one of the following statements is correct?

The equation of the straight line perpendicular to the straight line $3x + 2y = 0$ and passing through the point of intersection of the lines $x + 3y - 1 = 0$ and $x - 2y + 4 = 0$ is

$\sum_{n=1}^{\infty} \frac{2n^2+n+1}{n!}$ is equal to

Identify the correct statements from the following: $(i)$ The cryptozoite ingests food and becomes spherical. $(ii)$ Sporozoites enter the human blood. $(iii)$ Two stages of the life cycle are observed in Plasmodium. $(iv)$ The cryptozoite transforms into cryptomerozoites.