Which insecticide is used for termite control in buildings?

Which of the following statements is incorrect?

$A$: Barley,sorghum,and millet are smother crops.
$R$: They favor the growth of some common weeds.

Which is the primary crop of Asia?

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?

Match the names given under Column-$I$ with their relations given under Column-$II$, and choose the answer which gives the correct combination of the alphabets of the two columns.

Column-$I$ (Name)	Column-$II$ (Relations)
$A$. Bombyx mori	$P$. Disease of mulberry
$B$. Morus alba	$Q$. Centre where silkworm eggs are produced and supplied
$C$. Grainage	$R$. Silk moth
$D$. Powdery mildew	$S$. Mulberry plant
	$T$. Freshly hatched silkworm