After how many weeks is the callus obtained?

Identify the incorrect statements from the following:
$(i)$ Callus is obtained in $2$ to $3$ weeks.
$(ii)$ Suspension culture does not show faster growth compared to callus culture.
$(iii)$ Orchid seeds do not contain stored food.
$(iv)$ $2,4-D$ is used only in callus culture.

Somaclones are obtained by

What is the process of transferring cell culture from an old medium to a new medium called?

In which method are groups of cells suspended in a liquid medium?

To isolate protoplast,one needs: