Each limited partnership shall continuously maintain in this state: I. A registered office that may be the same as any of its places of business; and II. A registered agent, which agent may be: (a) An individual who resides in this state and whose business office is identical with the registered office; or (b) A corporation organized or authorized under RSA 292, RSA 293-A, or RSA 294-A whose business office is identical with the registered office; or (c) A limited liability company formed or authorized under RSA 304-C whose business office is identical with the registered office; or (d) A limited liability partnership formed or authorized under RSA 304-A:44 whose business office is identical with the registered office.