The correct option is D Pasteur effect
Answer is option A i.e. "Pasteur effect"
Pasteur effect is exhibited in yeast cells during anaerobic fermentation. Pasteur effect influences the rate of glycolysis and occurs in presence of oxygen which decreases the rate of sugar breakdown in yeast.
While, Blackman's law and Emerson effect is related to determining the rate of photosynthesis. Chargraff's rule is a rule for base equivalence in DNA.