The first transgenic cow,'Rosie',was produced in the year .........

$A$: Transgenic mice are being used to test the safety of the polio vaccine.
$R$: It could replace the use of monkeys to test the safety of batches of the vaccine.

Consider the following statements about 'Rosie':
$I$. Rosie is the first transgenic cow.
$II$. Rosie produced human protein-enriched milk.
$III$. The milk contained the human $\alpha$-lactalbumin,and scientists believe that the milk from this cow could provide an alternative to human breast milk.
Which of the statements given above are correct?

In the cloning of cattle,a fertilized egg is taken out of the mother's womb and:

Rosie is . . . . . . .

Read the following four statements $(A-D)$ and identify the mistakes in two of them.
$(A)$ The first transgenic cow,Rosie,produced milk which was human alpha-lactalbumin enriched.
$(B)$ Restriction enzymes are used in the isolation of $DNA$ from other macromolecules.
$(C)$ Downstream processing is one of the steps of $rDNA$ technology.
$(D)$ Disarmed pathogen vectors are also used in the transfer of $rDNA$ into the host.
Which of the two statements have mistakes?