Thank you for your response . I did call the eithad customer service and they were not help at all. Only the statement they use is "we are not allowed to give any information regarding visa"
Only the thing that worry me is someone told me that although I am not leaving airport if I didn't get transit visa then they might not let to board the connecting flight. N its for my parents ,I Dnt want them to face any problem coj it will be total hazard for them .