**Core Concept**
Language milestones are crucial developmental markers in infants and toddlers, indicating normal cognitive, social, and communication progress. At 15 months, children typically exhibit significant language advancements, which are essential for assessing their overall development.

**Why the Correct Answer is Right**
The correct answer will be a language milestone that is not typically achieved at 15 months of age. This requires an understanding of the normal language development timeline, which includes:
- Saying a few words to communicate (e.g., "mama" or "dada")
- Imitating words and gestures
- Pointing to objects
- Saying a few words to identify pictures

At 15 months, children usually start combining two words together, such as "mama go." However, not all language milestones occur at this age.

**Why Each Wrong Option is Incorrect**
**Option A:** Saying a few words to communicate is a typical milestone at 15 months.
**Option B:** Imitating words and gestures is also a common milestone at this age.
**Option C:** Pointing to objects is usually achieved by 12 months.
**Option D:** Saying a few words to identify pictures is not a typical milestone at 15 months; instead, children at this age start combining two words together.

**Clinical Pearl / High-Yield Fact**
Children's language development can be divided into four stages: prelinguistic (0-12 months), protolinguistic (12-18 months), descriptive (18-24 months), and complex (2-3 years). Recognizing these stages is essential for assessing language development in children.

**Correct Answer: C. Pointing to objects is usually achieved by 12 months.**