ANSWER:
World Health Organization places neuropsychiatric disorders at 'First' level.
Step-by-step explanation:
- The WHO has listed the probable causes of disability in the U.S. and Canada which places neuropsychiatric disorders in the 'first place'.
- Mental illness of a person is considered as a root cause for an estimated 59% of the economic costs obtained from injury or illness.
- This leads to 'productivity loss' in the US. Canadian university has reported that absentees for sessions due to psychological reasons had increased 400% from 1993 to 1999.
- The same survey reveals that in many developed countries, '35% to 45%' of 'absenteeism' from work is due to 'mental health problems'.