Final answer:
The purpose of the Sims Uterine Sound is to measure the depth of the intrauterine cavity, which aids in various gynecological procedures.
Step-by-step explanation:
The Sims Uterine Sound is a medical instrument used primarily for depth measurement of the intrauterine cavity. The Sims Uterine Sound is inserted into the uterus to measure the length of the cavity, which is important for diagnosing uterine abnormalities, determining the correct size of intrauterine devices (IUDs), and for other gynecological procedures. Therefore, the correct answer to the purpose of the Sims Uterine Sound is option 2) Depth measurement of intrauterine cavity.