The desirability quotient or DQ for methapyrilene is low.
Methapyrilene refers to an anticholinergic and antihistamine of the pyridine chemical category that was formulated in the initial 1950s. It was traded under the names Histadyl EC and Co-Pyronil.
It exhibits comparatively strong sedative influences, to the degree that its main application was as a medicine for insomnia in spite of its antihistamine activity.
I think the correct answer among the choices listed above is option B. For photoperiodism to occur, a plant must use a phytochrome. This is a pigment that plants use to detect light. It is sensitive to light in the red region. Hope this answers the question.
