Which of the following is used in tissue culture?

How is a somatic hybrid different from a hybrid?

What is the process of transferring a culture into fresh glass apparatus called?

The reason for the formation of an embryoid from a pollen grain in a tissue culture medium is:

The plants produced from tissue culture are genetically identical to the original plant from which they are grown,so they are called:

Assertion $A$: In the plant tissue culture method,the nutrient content of the medium decreases.
Reason $R$: In this method,the biomass of cells or tissues increases.
Which option is correct for Assertion $A$ and Reason $R$?