Choose the correct sentence:

A. He has been sleeping while 2 hours
B. He has been sleeping since 2 hours
C. He has been sleeping for 2 hours
D. He has been sleeping on 2 hours

Choose the correct answer from the options given below:

C

The correct answer is Option (4) - C

"for 2 hours" – Correct usage with the present perfect continuous tense to show the duration of an action.

• A. while 2 hours – "While" is not used to show duration with a time quantity.

• B. since 2 hours – "Since" is used with a specific point in time (e.g., since 2 PM), not a duration.

• D. on 2 hours – "On" is incorrect in this context.