Choose the correct words from the options to complete the sentence correctly: Khalid is ____ taller than Naveed.

Not as tall but as

As tall, if not

As if not

As tall as, if not

The correct sentence is: Khalid is As tall as, if not taller than Naveed.
The phrase "as tall as, if not" is used to compare Khalid's height to Naveed's, suggesting that Khalid is at least as tall as Naveed, and possibly taller.