Minimum percentage of global biodiversity in major invertebrate and plant taxa, is seen in:

Crustaceans and lichens

The correct answer is Option (2) → Crustaceans and lichens 

Crustaceans have relatively lower species richness among invertebrates.Molluscs have higher species richness than crustaceans but are still lower compared to other animal groups. Other animal groups (such as annelids, nematodes, and arachnids) have moderate species richness.Insects have the highest species richness among invertebrates by far, with millions of described species.

More than 70 per cent of all the species recorded are animals, while plants (including algae, fungi, bryophytes, gymnosperms and angiosperms) comprise no more than 22 per cent of the total. Among plants lichens have minimum percentage of global biodiversity .