MCQ
Life originated in:
- ✓Precambrian era
- BProterozoic era
- CMesozoic era
- DCenozoic era
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$I$. Lymphocytes are obtained from the patients
$II$. Lymphocytes are transferred to the culture dishes
$III$. Lymphocytes are transfected with the normal $ADA$ genes
$IV$. The transfected cell are returned to the patients
The chronological order should be