Which of the following events takes place in a ring girdled plant?

The correct option is "The shoots and the root dies first".

In a ring-girdled plant, a ring of bark is carefully removed from the stem, which includes the removal of the phloem tissue while keeping the xylem tissue intact. The phloem is responsible for transporting organic nutrients (mainly sugars produced during photosynthesis) from the leaves (shoot) down to the roots. Since the phloem is removed, the downward translocation of food is blocked, and nutrients accumulate above the girdle. Deprived of food, the roots will eventually starve and die. When the roots die, they can no longer absorb water and minerals from the soil. Consequently, the shoot is deprived of water and also dies. Therefore, both the shoot and the root die.