Correct

相认

/ xiāngrèn /
Strokes

Definition

to know each other/to recognize/to identify/to acknowledge (an old relationship)

Example

As a Verb

be acquainted with each other; know

1
men
我们
gēnběn
根本
xiāngrèn
相认
  

We don't know each other at all.

As a Verb

recognize; identify

2
sàn
离散
duōnián
多年
hòu
以后
  
,
父子
liǎ
chóngxīn
重新
xiāng
rèn
le
  

The father and son resumed their relationship after a long separation.

3
Nán
难以
xiāng
rèn

be difficult to recognize; be hardly recognizable