“Gram view” is a vegetation index proposed by:

Correct option is C

· HJ & Boman described GRAM (Green Ratio Ambience Measure) view in vegetation analysis.
· Used in remote sensing for crop monitoring, biomass estimation.
· Part of early vegetation index development literature.
Why other options are wrong
· (a) HJ alone does not define the index.
· (b) Boman alone not credited.
· (d) Tucker gave NDVI, not Gram view.