P = Phosphate NB = Nitrogen Base
also need to choose a
letter from the following
types of nitrogen bases
C - Cytosine
A - Adenine
T - Thymine
G - Guanine
G
D - Deoxyribose
sugar

All the circles are phosphates, they are the polar phosphate head. (P)

The squares (the ones that are vertical) that are linked with the cirlces are the deoxyribose sugars. (D)

the square that is linked with a is thymine (T)

the squares linked with g are cytosine (C)

answer: i don't know

explanation:

you need to provide a picture, otherwise i can't tell you.

if you can provide one, i'd be more than happy to you with this!