प्र:

Select the option that corrects the incorrectly spelt words in the given sentence.
 Ventilaton system is mising in this room. 

• 1
  Ventiltion system is missing in this room.
• 2
  Ventilation system is mising in this rum.
• 3
  Ventilation system is missing in this room.
• 4
  Wentilation system is mesing in this room.