Explanation:

- Option 1: The suit does not abate on death of the plaintiff or defendant

- Rights to sue for damages, debts, or wrongs to property typically do not extinguish upon the death of involved parties.

- Legal proceedings can often continue with the deceased party's estate or representatives.

- Option 2: A suit for account against an agent can be proceeded against his legal representative

- If an agent dies, the responsibility for their actions may be transferable to their legal representatives.

- Legal obligations to provide an account may not dissolve on death.

- Option 3: Both (A) and (B)

- This option indicates both statements (A) and (B) are correct and applicable.

- Option 4: None of these

- This would mean neither statement (A) nor (B) is correct.

Option 3: Both (A) and (B) encapsulates both statements accurately as true, hence it is the correct choice.