Odd Man Out Questions

Dear Reader,
Below are given questions to find the odd options.
Question 1
Cricket, Hockey, Tennis, Polo, Badminton
Answer : Polo
Reason :

All games are played only by Human's except Polo. Polo is the game played by sitting in horseback.
Question 2
Orthopology, Cytology, Deltilogy, Orinithology
Answer : Deltilogy
Reason :
Except Deltilogy all other terms are related to the study of science. Deltilogy is the collection and study of postcards.
Question 3
Hotel, Home, Hostel, Hospital, Motel
Answer : Home
Reason :
All other indicate staying places belonging to "Outsiders". Home indicates "our own place".
Question 4
Yellow, Green, Red, Blue, White.
Answer : White
Reason :
Except white all colours are part of the Rainbow. White is the combination of all seven colours of the rainbow.
Question 5
Pond, River, Well, Lake , Riverlet
Answer: Well
Reason :
Except Well all others are natural forms of water storage. "Well" is man made.