The correct answer is (b) Allosteric feedback inhibition
The best explanation: In the above diagram, allosteric feedback inhibition is represented. In allosteric feedback inhibition, the enzyme is inhibited by the end product of the multienzyme system. This leads to slowing down of the whole enzyme system to bring the rate of production of its end product back into balance when the cell needs it. In this case, the first enzyme, δ-aminolevulenic acid synthase is an allosteric enzyme that is inhibited by its end product heme.