Except glare, all the others are the sources of light.

All the others are related to the eye.

Calcium is found in food.

Oscar is the only International Award among the national ones.

'Acre' is the unit of measurement of area. 

All except 2 are suits of playing cards, while ace is a particular card.

All the others are heavenly bodies that move in space.

All the words, except carelessness, mean almost the same with different degrees.

All the others are emotions, except laughter.

Circle does not have straight lines. All other options have straight lines.

All the others come under the category of cattle.

All the others are forms of fuel, except coal tar.

The governor is nominated by the president, while others are selected through elections. 

Except flute, all the others are string instruments.

All the others are played with a ball.

All the others are parts of a gun. 

All are measuring instruments, except diameter.

Option (2) is the correct answer.

Except tractor, all the others are modes of transport for people.

All the other options are hill stations.