What is a Required Input for the Light-Independent Reactions

Question

What is a required input for the light-independent reactions?  
A) NADPH
B) Phosphoglyceric acid (PGA)
C) Phosphoglyceraldehyde (PGAL)
D) Glucose
E) Ribulose bisphosphate

Accepted Answer

The light-independent reactions, also known as the Calvin cycle, require NADPH as an input to provide the reducing power needed to convert carbon dioxide into glucose.