Somaclones can be obtained from which of the following?

Assertion $A$: Growth is faster in suspension culture compared to callus culture.
Reason $R$: Agitating the culture in the medium using a rotary shaker facilitates the mixing of nutrients and gas exchange.

Somaclonal variation appears in plants:

Which statement is most appropriate for plant tissue culture?

$A$ technique of micropropagation is

The main technique involved in agricultural biotechnology is called