Options:
A.
B.
C.
D.
E.
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Earlier discussion
1 older comment kept for context.
isaac alamu
correct option is D.Andropogon tectorus is the botanical name of nothern gamba,Andropogon gayanus is for southern gamba, Pennisetum purpurem is the botanical name of elephant grass, Panicum maximum is the botanical name of guinea grass. the botanical name for giant star grass is the one at option D.