Figure shows the effect of light on the rate of photosynthesis

Figure shows the effect of light on the rate of photosynthesis. Based on the graph, answer the following questions:

(a) At higher light intensities, the rate of photosynthesis becomes limiting -A/B point.
(b) Light.
© Saturation of light ©. The rate of photosynthesis
is not increased by increasing intensity of light (D) Represent intensity of light at which same factor may be limiting.