Select the most appropriate option to substitute the underlined segment in the given sentence.
Though Kalpana listened to Sheetal carefully, she knew that she should take it with a grain of salt.

The correct option is "regard it as exaggerated and not completely true".

Explanation:
The idiom "take (something) with a grain of salt" (or "a pinch of salt") means to view something with skepticism, or to regard a statement as exaggerated or not entirely accurate or true.

In the given sentence, Kalpana listened to Sheetal carefully, but she knew she should not completely believe everything Sheetal said without some skepticism.

Therefore, the segment "take it with a grain of salt" is best substituted by "regard it as exaggerated and not completely true".