**Core Concept:** Cryptorchidism is the condition where one or both testes fail to descend into the scrotum. In this question, we consider a scenario where the left testis is normally descended but the right testis is not.

**Why the Correct Answer is Right:**

The correct answer (D) refers to a surgical procedure known as orchidopexy, which involves the surgical fixation of an undescended testicle to the scrotum to maintain its position. This is the appropriate treatment for the right cryptorchid testis in this scenario, as it aims to normalize the location of the testis within the scrotum.

**Why Each Wrong Option is Incorrect:**

A) In this scenario, the left testis is normally descended, so removing it (Option A) would not address the issue of the right cryptorchid testis.

B) Orchiectomy (removal of both testes) is usually reserved for cases of severe medical complications or when conservative management fails. In this scenario, it is not the correct treatment for the right cryptorchid testis.

C) Inguinal orchiectomy (removal of the undescended testis) is a surgical procedure to treat testicular torsion, not cryptorchidism. This option does not address the issue of the normally descended left testis.

**Clinical Pearl:** Orchidopexy is typically performed at a younger age (before the age of 6-12 months) to ensure optimal testicular function and reduce the risk of testicular cancer. This procedure can be done under local anesthesia and involves attaching the undescended testis to the scrotum.

**Correct Answer:** D) Orchidopexy