help please Which of the following elements is/are represented in the spectrum below?

http://media.education2020.com/evresources/GizmoQuestions/EL_MSES_StarSpectra4.gif

a.Hydrogen only
b.Helium only
c.Hydrogen and helium
d.Calcium only

Question

help please Which of the following elements is/are represented in the spectrum below? 

http://media.education2020.com/evresources/GizmoQuestions/EL_MSES_StarSpectra4.gif 

a.Hydrogen only 
b.Helium only
 c.Hydrogen and helium 
d.Calcium only

peterg2001 · Answer

@Xmoses1

xmoses1 · Answer

Wow I have no idea @Destinymasha

destinymasha · Answer

Yea, I don't have an Idea, either >,<
Sorry ._.

peterg2001 · Answer

@wwhitlock

wwhitlock · Answer

I'm not great at reading these. All 3 elements mentioned are represented. Me best guess is C. The others say one element only. C doesn't list calcium but it doesn't say only. That's as far as I can get with it.