The World Health Organization (WHO) has determined that the standard audible capacity of a healthy human being falls within the range of 5-10 decibels. Decibels is the unit used to measure sound intensity. Option 1, 45-50 decibels, and option 2, 200-250 decibels, are both considerably higher than the standard audible capacity and would likely indicate hearing impairment or the presence of very loud sounds, such as a jet engine or an explosion. Option 4, 2000-2500 decibels, is an extremely high and unrealistic range that does not align with normal human hearing. Therefore, the correct answer is option 3, 5-10 decibels, which is supported by the World Health Organization`s guidelines.