Explanation

The generally accepted historical difference in age between Hazrat Umar R.A and Prophet Muhammad (PBUH) is not precisely 13 years based on standard sources. Option A states a difference of 10 years which might be an approximation from some sources but is not the widely cited figure. Option C suggests 17 years, which also does not align with common historical accounts regarding their ages. Therefore, 'None of these' (D) is likely correct.