Choose or find odd number pair - (21 - 6) , (28 - 42) , (42 - 12) , (84 -24)

B. 28 - 42

Choose or find odd letter group - AEC , PTR , FJH , UYW , KPM

E. KPM

Choose or find odd number - 10 , 11 , 15 , 16

B. 11

Choose or find odd word - Baghdad , Beijing , Delhi , Pakistan , Rangoon

D. PAKISTAN

Choose or find odd word - Sial , Mantle , Core , Sima , Pengia

A. PENGIA