Micro-propagation is:
a. propagation of microbes in vitro
b. propagation of plants in vitro
c. propagation of cells in vitro
d. growing plants on a smaller scale
The answer is the option (b) propagation of plants in vitro
Explanation: Smaller scale can mean a small flowerpot, so option ‘d’ is incorrect. Microbes and cells are small enough to be easily grown in vitro and hence options a and c are incorrect.