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

A. 80 - 9

Choose or find odd letter group - adcq , pqrB , mnpC , xyzT , efgP

A. ABCQ

Choose or find odd word - Cranium , Tendron , Diaphragm , Rib cage , Pericardium

B. TENDRON

Choose or find odd letter group - CFIL, PSVX, JMPS, ORUX, QTWZ

B. PSVX

Choose or find odd word - Deck , Quay , Stern , Bow , Mast

B. QUAY