In the following question, four number pairs are given. The number on left side of (–) is related to the number of the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.
A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series. ? , Microgram, Milligram, Gram