**Core Concept**
Ossification at two months refers to the process of bone formation, specifically the conversion of cartilage into bone tissue, which is a critical aspect of fetal development. This process involves the transformation of hyaline cartilage into bone through the action of chondrocytes and osteoblasts, leading to the formation of primary ossification centers.

**Why the Correct Answer is Right**
At two months of gestation, the process of ossification is initiated in the long bones of the fetus, including the femur, humerus, and tibia. This is achieved through the action of chondrocytes, which convert cartilage into bone tissue. The process of ossification is controlled by the genetic regulation of osteoblasts, which secrete the bone matrix and minerals necessary for bone formation. The primary ossification centers in the long bones are responsible for the initial formation of bone tissue, which will eventually give rise to the shaft (diaphysis) of the bone.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as ossification at two months is not primarily related to the formation of bone tissue in the skull.
**Option B:** This option is incorrect as the process of ossification at two months is not primarily related to the formation of bone tissue in the pelvis.
**Option C:** This option is incorrect as the process of ossification at two months is not primarily related to the formation of bone tissue in the hands and feet.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that ossification centers in the long bones are responsible for the initial formation of bone tissue, which will eventually give rise to the shaft (diaphysis) of the bone. This knowledge is crucial for understanding bone development and growth patterns in the fetus and child.

**Correct Answer: C. Ossification centers are present in the shaft (diaphysis) of the long bones.**