Dna nucleotides are made up of
a. a sugar group, an amino acid group and a nitrogenous base.
b. a phosphate group, a sugar group and a nitrogenous base.
c. a protein group, a sugar group and a nitrogenous base.
d. a phosphate group, a starch group and a nitrogenous base.

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.

the correct answer is d