Choose the appropriate preposition: Jamil is in hospital. He has been in hospital_____ Monday.

- The correct answer is: Since 

Since
- Since is typically used with perfect tenses.  
- We use since with the Perfect Tenses to express a point of time in the past up to now.
Example: I’ve known him since I was a child.

অন্য দিকে. 
For
- When used as preposition of time, for is used with a period of time.  
- Note that although for is sometimes called a keyword for the Perfect Tenses, it can be used with all the other tenses.
Example Sentences: I lived in England for 10 years.

Until
- We use until to mean the end time, up to a specific time or a point in time.
Example: I will work until 5p.m. today.

Source: Grammarly.com