The Calvin cycle is:

The thylakoids are removed and kept in a culture medium containing $CO_2$ and $H_2O$. If the setup is exposed to light,hexose sugars are not formed as the end product. The most appropriate reason for this is that

In dark reaction,the first reaction is

Which is the first stable product formed in $C_3$ plants during the dark reaction of photosynthesis?

Consider the given two statements:
Statement $I$: Carbon reactions during photosynthesis in higher plants are called as dark reactions.
Statement $II$: They always occur in darkness and they are not light-dependent.

In the condensed schematic representation of the dark reaction of photosynthesis given below,steps are indicated by alphabets. Select the option where the alphabets are correctly identified.