Nastic movements differ from tropic movements in being

Explain the formula for rapid growth in plants.

Explain the factors affecting growth.

Select the correct option for the absolute growth and relative growth of the leaf shown below.

Explain the conditions for growth in plants.

Assertion $(S)$: Growth occurs when anabolic processes exceed catabolic processes.
Reason $(R)$: Growth is the result of metabolism.
$(A)$ Both $S$ and $R$ are true,and $R$ is the correct explanation of $S$.
$(B)$ Both $S$ and $R$ are true,but $R$ is not the correct explanation of $S$.
$(C)$ $S$ is true and $R$ is false.
$(D)$ $S$ is false and $R$ is true.