Choose or find odd word - Admiral , Colonel , Captain , Commodore , Lieutenant

B. COLONEL

Choose or find odd word - Mosses , Lichens , Ferns , Cacti

D. CACTI

Choose or find odd word - Correction , Improvement , Betterment , Elevation

D. ELEVATION

Choose or find odd word - Polar bear , Reindeer , Yak , Silver fox , Leopard

E. LEOPARD

Choose or find odd number pair - (71, 7, 3, 17), (67, 71, 3, 5), (41, 5, 3, 47), (37, 47, 19, 7), (11, 3, 3, 17)

D. 37, 47, 19, 7