Hechtian strands are observed during:
That points to B: Plasmolysis. Compared with the other options, Plasmolysis is the one that correctly describes the BASICS of PLANT concept. The wrong ones are A) Cytokinesis; C) Cell elongation; D) Cell division. If you’re stuck, eliminate anything that contradicts a basic fact you already know for this topic.
Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.