**Core Concept**
High viscosity of saliva in children is indeed associated with an increased incidence of caries. This is because thick, viscous saliva is less effective in washing away bacteria and food particles from the teeth, creating an environment conducive to dental plaque formation and subsequent caries development.

**Why the Correct Answer is Right**
The partial truth lies in the fact that a high viscosity of saliva can indeed contribute to an increased risk of caries in children. This is because saliva plays a crucial role in oral health by facilitating the removal of bacteria and food particles from the teeth through the process of salivary clearance. However, the statement is not entirely accurate, as other factors such as the composition and flow rate of saliva, as well as oral hygiene practices, also play significant roles in determining the risk of caries.

**Why Each Wrong Option is Incorrect**
**Option A:** The statement is not entirely true because it oversimplifies the relationship between saliva viscosity and caries risk. Other factors, such as saliva composition and flow rate, also contribute to caries development.
**Option C:** The statement is not entirely false because high saliva viscosity can indeed contribute to an increased risk of caries in children. However, it is not the sole determining factor.
**Option D:** The statement is not partially false because it is not entirely false; it is partially true, as high saliva viscosity can increase the risk of caries.

**Clinical Pearl / High-Yield Fact**
It is essential for pediatric dentists to assess the composition and flow rate of saliva in children, in addition to evaluating their oral hygiene practices, to determine their individual risk of caries. This can help in implementing targeted preventive measures to reduce the risk of caries.

**✓ Correct Answer: B. Statement is partially true**