Which cell organelle is responsible for the synthesis of steroids?

Which of the following is the primary source of the cell membrane?

Which cell organelle divides the intracellular space into two distinct compartments,i.e.,$luminal$ (inside the endoplasmic reticulum) and $extra-luminal$ (cytoplasm)?

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A)$: The primary function of the Golgi apparatus is to package the materials made by the endoplasmic reticulum and deliver it to intracellular targets and outside the cell.
Reason $(R)$: Vesicles containing materials made by the endoplasmic reticulum fuse with the cis face of the Golgi apparatus,and they are modified and released from the trans face of the Golgi apparatus.
In the light of the above statements,choose the correct answer from the options given below:

How many cisternae are typically present in a stack of the Golgi apparatus?

In plant cells,the dictyosomes are derived from