**Core Concept**
Hyperextensibility with normal elastic recoil refers to the ability of a joint or skin to stretch beyond its normal range without losing elasticity. This is often seen in disorders of collagen, a key protein in connective tissue.

**Why the Correct Answer is Right**
The correct answer is associated with Ehlers-Danlos syndrome (EDS), a group of genetic disorders affecting collagen production. In EDS, the hyperextensible joints and skin are due to mutations in genes encoding collagen type V and other collagen-related proteins. This results in a loss of tensile strength and elasticity in the connective tissue, leading to hyperextensibility with normal elastic recoil.

**Why Each Wrong Option is Incorrect**
**Option A:** Osteogenesis imperfecta is a disorder of collagen, but it is primarily characterized by fragile bones and blue sclerae, not hyperextensibility.
**Option B:** Marfan syndrome is a disorder of fibrillin-1, a protein involved in elastic fiber formation, but it is primarily characterized by tall stature, arachnodactyly, and aortic root dilatation, not hyperextensibility.
**Option C:** Dermatomyositis is an inflammatory disorder of the skin and muscles, but it is not associated with hyperextensibility or collagen disorders.

**Clinical Pearl / High-Yield Fact**
Ehlers-Danlos syndrome is a heterogeneous group of disorders with varying degrees of severity and different clinical features, including joint hypermobility, skin hyperextensibility, and tissue fragility.

**Correct Answer: C. Marfan syndrome is a disorder of fibrillin-1, a protein involved in elastic fiber formation, but it is primarily characterized by tall stature, arachnodactyly, and aortic root dilatation, not hyperextensibility.