Question

look at this dictionary entry.
brainchild \breyn-chahyld\\ noun 1. a product of someones creative work:
basketball, the brainchild of canadian physical education teacher james
naismith, was invented in 1891. — from english
which sentence uses the word brainchild correctly?
although alexander graham bell obtained the first patent for a telephone, the
device was originally the brainchild of antonio meucci.
chemist stephanie kwolek was the brainchild behind kevlar, the super-strong
fabric used in body armor, spacesuits, and many other products.

Explanation:

First, confirm the definition of "brainchild": it refers to a creative product/idea originating from a person.

1. For the first sentence: The telephone is a creative invention, and it states the device was Antonio Meucci's creative work, which matches the definition.
2. For the second sentence: It incorrectly uses "brainchild" to refer to a person (Stephanie Kwolek), but the word describes a creative product/idea, not a person.

Answer:

Although Alexander Graham Bell obtained the first patent for a telephone, the device was originally the brainchild of Antonio Meucci.