MCQ
Soil fertility is reduced by:
- ACrop rotation.
- BNitrogen-fixing bacteria.
- CDecaying organic matter.
- DIntensive agriculture.
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$A.$ Castration is a method of contraception
$B.$ $MTPs$ have a significant role in decreasing the size of population, so it is legal.
$C.$ Amniocentesis for sex determination is banned in our country
$D.$ Nearly $45\; to 50$ million $MTPs$ are performed in a year all over the world
$II. ...C...$ are hybrid vectors derived from plasmids which contain or site of $\lambda$ phage
$A, B$ and $C$ in above statements refers to