I dont know understand this sentence kinldy explain

Question

I'm getting forgetful in my old age.

Answer 1

This sentence could be uttered by any adult who has inadvertently forgotten something. Because forgetfulness is associated with the elderly, even a young adult could use this as excuse offered without apology.

Answer 2

This means that this person is not young anymore, and because of his or her age, starts forgetting a lot of things. This sentence could be used as an excuse. Just imagine this dialogue:

A: Really? I don't remember.

B: But I just told you yesterday!

A: I'm sorry! I'm getting forgetful in my old age.