Which of the following is a sentence fragment?
a. marina is a fast runner and skilled basketball
b. marina, and excellent basketball player
c. marina has a very strong basketball skills
d. marina, a great basket ball player, scored 26 pints today.
Assuming you mean to write "basketball player" in the first option, "b. marina, and excellent basketball player" would be a sentence fragment since there is no verb--it is only describing Marina.
