Choose or find odd word - Viscometer , Anemometer , Spectroscope , Pyknometer

B. ANEMOMETER

Choose or find odd pair of words - (Broad : Wide) , (Light : Heavy) , (Tiny : Small) , (Big : Large)

B. LIGHT : HEAVY

Choose or find odd number - 49 , 63 , 77 , 81

D. 81

Choose or find odd word - Panaji , Bhopal , Pune , Shilong

C. PUNE

Choose or find odd word - Potassium , Silicon , Zirconium , Gallium , Germanium

A. POTASSIUM