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In a plant cell at flaccid state (TP = 0), the relationship between OP and DPD is:

ADPD = 0
BDPD = OP (since DPD = OP − TP = OP − 0)
CDPD = 2·OP
DDPD < 0
Answer & Solution
Correct answer: B. DPD = OP (since DPD = OP − TP = OP − 0)
DPD = OP − TP. When TP = 0 (flaccid cell), DPD = OP. The cell can absorb water maximally. As it absorbs water, TP rises and DPD falls — until full turgidity (TP = OP, DPD = 0).
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