MCQ
$PGR$ which was discovered by Cousins .........
- ALiquid in form
- ✓Gaseous form
- CStimulate cell division
- DStimulate phototropic movement
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$II.$ Promoted bud dormancy
$III.$ Promoted stomatal closure
$IV.$ Promoted abscission layer
Identify the hormone/s which promote/s all these events in plants and choose the correct option