Question

Identify odd one out according to types of indicator
1.litmus
2.methyl orange
3.phenolphthalein
4.universal indicator

Answer 1

Hi friend,

Universal indicator is the answer

Answer 2

Odd man Out : Option is 1. Litmus 

Reason :
Litmus is the natural indicator which is extracted from the lichen plant and helps us to identify whether the given substance is acidic or basic.

methyl orange ,phenolphthalein , universal indicator are the synthetic indicators which are prepared from chemicals 
Hence answer is litmus.