Question

In which sentence is the underlined word an indefinite article? A. The snow is white and fluffy. B. I ate a slice of melon. C. One tire needs more air in it.

Answer 1

The correct answer is B for your problem

Answer 2

Since the indefinite articles are "a" and "an", the correct answer here is B, because it is the only one which has "a" in front of a noun.