Choose or find odd word - Trigger , Muzzle , Pallete , Barrel , Bullet

C. PALLETE

Choose or find odd word - Cygnus , Orion , Scorpio , Cassiopeia , Vega

A. VEGA

Choose or find odd word - Odour , Smell , Foul , Fragrance , Incense

C. FOUL

Choose or find odd word - Pageant , View , Display , Spectacle

B. VIEW

Choose or find odd word - Epicentre , Seismology , Focus , Crater , Richter Scale

D. CRATER