Choose or find odd number pair - (3 - 4) , (4 - 7) , (5 - 12) , (20 - 21)

D. 20 - 21

Choose or find odd pair of words - (Sprinkle : Pour), (Happiness : Merriment), (Mist : Fog), (Sad : Unhappy)

D. SAD : UNHAPPY

Choose or find odd word - Grass , Amaranthus , Oats , Chenopodium , Convolvulus

C. OATS

Choose or find odd letter group - EBD , IFH , QNO , YVX

C. QNO

Choose or find odd word - Indigo , Orange , Yellow , Pink , Green

D. PINK