It’s very confusing sorry for that
Almost all enzymes will end in -ase but not all, some examples of enzymes are:
catalase
lactase
maltase
dna polymerase
amylase
lipase
trypsin
acetylcholinesterase
The answer is D. Telegraph, telephone, cordless phone , mobile
The concave disc shape of red blood cells Maximizes the surface area of the cell , allowing for rapid movement of oxygen or carbon dioxide to and form the hemoglobin within the cell.