Correct

混为一谈

/ hún wéi yī tán /
Strokes

Definition

to confuse one thing with another (idiom); to muddle

Example

Definition

lump/jumble together; confuse sth with sth else

1
néng
合法
de
rén
个人
利益
自私自利
húnwéitán
混为一谈
  

Legitimate personal interest must not be confused with selfishness.

2
Gōng
公司
cáiyuán
裁员
kāichú
开除
wèi
那位
kuài
会计
shì
liǎngshì
两码事
  
,
liǎngzhě
两者
néng
húnwéitán
混为一谈
  

The company's staff reduction and the dismissal of the accountant are separate matters and should not be mentioned in the same breath.