MCQ
Who provided X-ray diffraction data of DNA?
- ✓Maurice Wilkins & Rosalind Franklin
- BChargaff
- CWatson and Crick
- DHolley
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Few such steps include
$I.$ ensuring use of disposable needles and syringes
$II.$ free distribution of condoms
$III.$ advocating safe sex
$IV.$ controlling drug abuse
Which of the steps given above are correct?

$I.$ improved varieties of the crops
$II.$ Agro-chemicals
$III.$ Better management practices
Choose the correct option.