Increase in light intensity beyond saturation point causes:

More photosynthesis

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Less photosynthesis

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Breakdown of the chlorophyll and a decrease in photosynthesis

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Helicotropism

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Solution

The correct option is A More photosynthesis

It is based in the black man's law of limiting factor, in which rate of photosynthesis depends upon the limiting factors. When the light intensity reaches beyond its saturation point, there will not be any change in the rate of photosynthesis, but it will decrease eventually as shown in the graph.
so, the correct option is ' Less photosynthesis'.

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