**Core Concept**
Sjögren's syndrome is a chronic autoimmune disorder characterized by lymphocytic infiltration and destruction of the exocrine glands, particularly the salivary and lacrimal glands, leading to symptoms of dry mouth (xerostomia) and dry eyes (xerophthalmia).

**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology of Sjögren's syndrome, which involves the activation of autoreactive T and B cells against the antigens of the exocrine glands. This results in the production of autoantibodies, particularly anti-SSA/Ro and anti-SSB/La antibodies, which are highly specific for the disease. The lymphocytic infiltration and activation of immune cells in the affected glands lead to their destruction and the resulting symptoms.

**Why Each Wrong Option is Incorrect**
**Option A:** Sjögren's syndrome is not primarily associated with a specific HLA haplotype. While certain HLA haplotypes may be more common in patients with Sjögren's syndrome, the disease is not linked to a specific haplotype as it is with other autoimmune disorders like rheumatoid arthritis.

**Option B:** Sjögren's syndrome is not a rare disease. It is estimated to affect approximately 0.5-1.0% of the population, making it a relatively common autoimmune disorder.

**Option C:** Sjögren's syndrome is not typically associated with a high risk of malignancy. While patients with Sjögren's syndrome may have an increased risk of certain malignancies, such as lymphoma, this is not a characteristic feature of the disease.

**Clinical Pearl / High-Yield Fact**
One important aspect of Sjögren's syndrome is its association with other autoimmune disorders, such as rheumatoid arthritis, lupus, and scleroderma. Patients with Sjögren's syndrome are often referred to as having "overlap syndromes" and require careful evaluation and management of these associated conditions.

**Correct Answer: C. Sjögren's syndrome is typically not associated with a high risk of malignancy.**