The answer to this question would be labile.
A permanent cell is the one that will not divide after fully developed. This includes the heart and brain cells. That is why when these organs damaged there will be a permanent loss of function.
Stable cell only divides in some occasion. The example would be liver cells or kidney cells.
Conjugation is when genetic material is transferred from one bacteria to another via direct contact. Neither of these options are completely correct, but the more correct one would be the first.
Answer:
I have a chart for this if you'd like that it really helps to better understand the Nitrogen Cycle and how it works.