Correct

梦话

/ mènghuà /
Strokes

Definition

talking in one's sleep/words spoken during sleep/fig. speech bearing no relation to reality/delusions

Example

As a Noun

sleep-talking; somniloquence; somniloquy

1
Shuōmènghuà
说梦话

talk in one's sleep

As a Noun

daydream; nonsense; raving; rigmarole

2
Sān
yuè
zhǎng
掌握
mén
wài
外语
  
?
Jiǎnzhí
简直
shì
zài
shuōmènghuà
说梦话
  

To master a foreign language within three months? That's just daydreaming! / That's a sheer daydream!