Choose or find odd letter group - MEWGN , PBQTX , DRYSN , CGHKV , HLWZP

A. MEWGN

Choose or find odd word - Copper, Tin, Brass, Platinum, Zinc

C. BRASS

Choose or find odd word - Madagascar , Thailand , Cude , Greenland , Tasmania

B. THAILAND

Choose or find odd pair of words - (Pistol : Gun) , (Knife : Dagger) , (Engine : Train) , (Car : Bus)

C. ENGINE : TRAIN

Choose or find odd word - Kennel , House , Stable , Aviary , Aquarium

B. HOUSE