Choose or find odd number pair - (16 - 18) , (56 - 63) , (96 - 108) , (86 - 99)

D. 86 - 99

Choose or find odd letter group - DAH , IFM , ROV , QNT , SPW

D. QNT

Choose or find odd word - Microscope , Telescope , Periscope , Stethoscope

D. STETHOSCOPE

Choose or find odd word - Blade , Axe , Scissors , Needle

D. NEEDLE

Choose or find odd word - Euphrates , Hwang Ho , Amazon , Brahmaputra , Indus

C. AMAZON