Assembly of two subunit 40S and 60S of the ribosomes is?

70 S unit

80 S unit

50 S unit

100 S unit

The assembly of the 40S and 60S subunits of the ribosome creates an 80S unit.

80S unit:

This is the complete functional ribosome in eukaryotic cells, composed of the smaller 40S subunit and the larger 60S subunit.