MCQ
The discoverer of nucleic acid was:
- AMeischer
- BVon Mohel
- CKhorana
- DWatson-crick
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$R $ : It requires simultaneous plating on two plates having different antibiotics.

$I.$ Selection of pea plant
$II.$ Knowledge of history
$III.$ One character at one time
$IV.$ His statistical knowledge
Choose the correct option
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