In the most common dry cell what material is the electrode that is the center rod made of?

copper
graphite
iron***
zinc

2 answers

No.
https://www.google.com/search?q=dry+cell+construction&tbm=isch&imgil=AOCAb61wVBt45M%253A%253B3szRgvfh4PcZWM%253Bhttp%25253A%25252F%25252Fwww.rfcafe.com%25252Freferences%25252Felectrical%25252FNEETS-Modules%25252FNEETS-Module-01-2-21-2-29.htm&source=iu&pf=m&fir=AOCAb61wVBt45M%253A%252C3szRgvfh4PcZWM%252C_&usg=__j1HbknCFTsiajP5nspuMq34loVo%3D&biw=1015&bih=599&ved=0ahUKEwj9z_L3jvbMAhUiGFIKHXTDArkQyjcIKA&ei=7BFGV_2pFaKwyAL0hovICw#imgrc=fQ9ZDsilFKv5DM%3A
its graphite