Correct

独生子女

/ dúshēngzǐ nǚ / 
Strokes

Definition

an only child

Example

As a Noun

only child; sole offspring

1
Dúshēngzǐnǚzhèng
独生子女证

only-child/one-child certificate

2
Dúshēngzǐnǚ
独生子女
zhèngcè
政策

only-child policy; one child per family policy

3
Dúshēngzǐnǚ
独生子女
fèi
费

only-child/one-child allowance