What is required to obtain a variety with genetic variation?

Which is the most widely cultivated fiber crop in India?

Consider the following statements:
$I$. The progeny of cross-breeding may be used for commercial production.
$II$. In case of artificial insemination,the semen can be used immediately or can be frozen for later use.
$III$. Controlled breeding experiments are carried out using artificial insemination and multiple ovulation embryo transfer technology.
Which of the statements given above are correct?

What is the scientific name of pearl millet?

Which region is considered the secondary center of origin for coffee production?

From which of the following can a milk-like substance be prepared?