Choose or find odd number - 325 , 236 , 178 , 639 , 538

B. 236

Choose or find odd number pair - (80 - 9) , (64 - 8) , (36 - 6) , (7 - 49)

A. 80 - 9

Choose or find odd number pair - (46 - 10) , (42 - 33) , (20 - 38) , (12 - 91)

D. 12 - 91

Choose or find odd pair of words - (Pelican : Reptile) , (Gnu : Antelope) , (Elk : Deer) , (Shark : Fish)

A. PELICAN : REPTILE

Choose or find odd pair of words - (Scalpel : Surgeon) , (Chisel : Soldier) , (Awl : Cobbler) , (Knife : Chef)

B. CHISEL : SOLDIER