**Core Concept**
The gubernaculum is a fibrous structure that plays a crucial role in the development and descent of the testes during fetal development. It is a key component of the processus vaginalis, a peritoneal extension that guides the testes from the abdominal cavity to their final position in the scrotum.

**Why the Correct Answer is Right**
The gubernaculum attaches to the pubic symphysis (A), which is the cartilaginous joint between the left and right pubic bones. This attachment is essential for the gubernaculum's role in guiding the testes to their final position. Additionally, the gubernaculum attaches to the superficial perineal pouch (B), which is a fascial space in the perineum that contains the superficial perineal muscles. The gubernaculum also attaches to the anterior superior iliac spine (C), which is a bony landmark on the ilium that serves as an attachment point for various muscles and ligaments. However, the gubernaculum does not attach to the inguinal ligament (D), which is a fibrous structure that forms the floor of the inguinal canal.

**Why Each Wrong Option is Incorrect**
**Option A:** The pubic symphysis is a correct attachment point for the gubernaculum, as it plays a crucial role in the gubernaculum's function of guiding the testes to their final position.
**Option B:** The superficial perineal pouch is also a correct attachment point for the gubernaculum, as it is a fascial space that contains the superficial perineal muscles.
**Option C:** The anterior superior iliac spine is a correct attachment point for the gubernaculum, as it serves as an attachment point for various muscles and ligaments.
**Option D:** The inguinal ligament is not an attachment point for the gubernaculum, as it forms the floor of the inguinal canal and does not play a role in the gubernaculum's function.

**Clinical Pearl / High-Yield Fact**
The gubernaculum is a critical structure in the development and descent of the testes, and its abnormal development can lead to conditions such as cryptorchidism, where the testes fail to descend into the scrotum.

**✓ Correct Answer: D. Inguinal ligament**