DNA probes used in fingerprinting are

Which statements about insulin are correct?

$\left(\mathrm{i}\right)$ Raised blood glucose level triggers cells of Islets of Langerhans to release insulin.

$\left(\mathrm{ii}\right)$ Decreased blood glucose level triggers cells of Islets of Langerhans to release insulin.

$\left(\mathrm{iii}\right)$ The binding of insulin to receptors on the cell's membrane activates the transport of glucose and protein.

$\left(\mathrm{iv}\right)$ Without insulin, glucose builds up in the blood and the cells are starved of their energy source.

Assertion$\left(\mathrm{A}\right)$: Mice are a preferred choice for transgenic experiments.

Reason $\left(\mathrm{R}\right)$: Mice have short generation time.