Question

cocaine was first isolated (extracted from coca leaves) in 1859 by german chemist ____

thomas edison
coach mccrory
coach jackson
albert niemann

Explanation:

Thomas Edison was an inventor, not a chemist associated with cocaine isolation. Coach McCrory and Coach Jackson are not chemists. Albert Niemann was the German chemist who first isolated cocaine from coca leaves in 1859.

Answer:

D. Albert Niemann