The correct answer is option 4, which states that Sweetex used by diabetic patients has zero calories. This means that Sweetex does not contribute any energy or calories to the body when consumed.
Option 1, which states that Sweetex has five calories, is incorrect. If Sweetex had any calories, it would not be suitable for diabetic patients who need to carefully monitor their calorie intake.
Option 2, which states that Sweetex has ten calories, is also incorrect for the same reasons as option 1. Sweetex should not contain any calories to be suitable for diabetic patients.
Option 3, which states that Sweetex has a hundred calories, is significantly higher than options 1 and 2 and is also incorrect.
In summary, Sweetex used by diabetic patients should have zero calories to meet their dietary needs and restrictions.