I believe that Cell a is most likely in G1 phase.
The G1 phase, or the gap 1 phase, is the first of four phases of the cell cycle that takes place in eukaryotic cell division. In this part of interphase, the cell synthesizes mRNA and proteins in preparation for subsequent steps leading to mitosis. The phase ends when the cell moves into the S phase of interphase.
Answer:
The answer to your question is the Golgi apparatus
Explanation:
Mitochondria is letter G
Ribosome could be letter E
Golgi apparatus is letter A
Lysosome is letter B
Golgi apparatus has a function similar to a post office because it modified, sorted, packed and distributed proteins and lipids.
It's 163 to 164 centimeters meters