Answer:
A sugar called deoxyribose.
Explanation:
DNA is made up of molecules called "nucleotides". These are:
- A phosphate group
- A pentose sugar [deoxyribose]
- A nitrogen-containing base [adenine, thymine, guanine and cytosine]
Thus the first option is the right answer.
Reasons why the other options are wrong:
"A plasma called haemoglobin" is wrong as plasma and haemoglobin are related to the blood.
"A chemical called nucleic acid" is wrong as it is not what DNA's made up of. DNA and RNA are nucleic acids themselves.
"An acid called chlorophyll" is wrong as chlorophyll is related to plants.
