National economic production is expressed to be

  • A
    Gross national development
  • B
    National income
  • C
    National prosperity
  • D
    None

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$A$ : Inability to conceive or produce children even after $2 \;years$ of unprotected sexual cohabitation is infertility.
$R$ : In vitro fertilization followed by transfer of embryo into the female genital tract is ‘Test Tube Baby’ programme

In vivo fertilisation involves the fertilisation that takes place