Select the sentence that does NOT have a spelling error.
1
Humidifiers in the air-conditionning plants provide ideal surroundings for certain types of bacteria and have led to major outbreaks of pnemonia.
2
Humidifiers in the air-conditioning plants provide ideal surroundings for certain types of bacteria and have led to major outbrakes of pnemonia.
3
Humidifiers in the air-conditioning plants provide ideal surroundings for certain types of bacteria and have led to major outbreaks of pneumonia.
4
Humidefiers in the air-conditioning plants provide ideal suroundings for certain types of bacteria and have led to major outbreaks of pneumonia.