HORTICULTURE

Detailed explanation-1: -In this reaction, the energy from ATP and NADPH are used to fix carbon dioxide (CO2). So NADH is not a product of the light reaction of photosynthesis.

Detailed explanation-2: -In the light reactions, energy from sunlight drives the synthesis of ATP and NADPH, coupled to the formation of O2 from H2O. In the dark reactions, so named because they do not require sunlight, the ATP and NADPH produced by the light reactions drive glucose synthesis.

Detailed explanation-3: -When NAD oxidises a molecule by accepting electrons and adding hydrogen ions to the chemical, it produces NADH. The initial phase of photosynthesis is the light reaction, which converts solar energy into chemical energy. Solar energy is absorbed by chlorophyll during this process, and water is photolyzed.