Given below are two statements. One is labelled Assertion (A) and the other is labelled Reason (R).
Assertion (A): The Golgi apparatus remains in close association with the endoplasmic reticulum.
Reason (R): Materials to be packaged in the form of vesicles from the ER fuse with the cis face of the Golgi apparatus and move towards the maturing face.
In light of the above statements, choose the correct answer from the options given below.

The assertion is correct. The Golgi apparatus is indeed closely associated with the endoplasmic reticulum (ER) in most eukaryotic cells. This association facilitates the transfer of newly synthesized proteins and lipids from the ER to the Golgi apparatus for further processing and sorting.

The reason is also correct. Newly synthesised proteins and lipids are packaged into vesicles at the endoplasmic reticulum (ER). These vesicles then fuse with the cis face of the Golgi apparatus, where their contents are modified and sorted. The vesicles then move through the Golgi stack, undergoing further processing as they progress from the cis face to the trans face, also known as the maturing face, before being released from the Golgi apparatus to their final destinations.

Therefore, both Assertion (A) and Reason (R) are correct, and Reason (R) provides a valid explanation for Assertion (A).