Choose or find odd number - 8314, 2709, 1315, 2518, 3249

A. 8314

Choose or find odd pair of words - (Onomatology : Names) , (Nidology : Nests) , (Phycology : Algae) , (Concology : Shells)

D. CONCOLOGY : SHELLS

Choose or find odd word - Thermometer , Hygrometer , Anemometer , Seismograph , Sphygmomanometer

E. SPHYGMOMANOMETER

Choose or find odd word - Cockroach , Roundworm , Amoeba , Frog

C. AMOEBA

Choose or find odd letter group - YDWB , TKRI , QNOM , HLFJ , WFUD

C. QNOM