**Core Concept**
The question is testing the understanding of the embryological development of the genital system, specifically the presence of testes in the inguinal canals, which is a characteristic feature of **Cryptorchidism**. This condition is associated with an underlying chromosomal abnormality.

**Why the Correct Answer is Right**
The presence of testes in the inguinal canals suggests an abnormal descent of the testes during embryological development. The correct karyotype to expect in this child would be **47,XXY**, also known as **Klinefelter syndrome**. This condition occurs due to the presence of an extra X chromosome in males, which leads to impaired testicular development and function. The testes may not descend properly, resulting in cryptorchidism.

**Why Each Wrong Option is Incorrect**
* **Option A:** 46,XY is the normal male karyotype, and would not be expected in a child with testes in the inguinal canals.
* **Option B:** 45,X is the karyotype associated with Turner syndrome, a condition that affects females, and would not be expected in a child with testes in the inguinal canals.
* **Option D:** 48,XXXY is a variant of Klinefelter syndrome, but is less common than 47,XXY.

**Clinical Pearl / High-Yield Fact**
Klinefelter syndrome is a sex chromosome disorder that affects males, and is characterized by the presence of an extra X chromosome. It is associated with a range of clinical features, including tall stature, infertility, and an increased risk of breast cancer.

**Correct Answer:** C. 47,XXY