To solve the question regarding human evolution, we need to evaluate each of the four statements provided and determine how many of them are correct.
### Step-by-Step Solution:
1. **Evaluate Statement I**:
- **Statement**: "The skull of baby human is more like an adult chimpanzee skull than an adult human skull."
- **Analysis**: This statement is incorrect. The skull of a baby human is more similar to that of an adult human than to that of an adult chimpanzee. Therefore, this statement is false.
2. **Evaluate Statement II**:
- **Statement**: "About two mya, Australopithecus probably lived in East African grassland."
- **Analysis**: This statement is also incorrect. Australopithecus is believed to have lived around 4 million years ago, not 2 million years ago. While they did inhabit areas that could be described as grasslands, the timeline is inaccurate. Therefore, this statement is false.
3. **Evaluate Statement III**:
- **Statement**: "The Neanderthal man with a brain size of 1400cc lived in the near East and Central Africa between 1,00,000-40,000 years back."
- **Analysis**: This statement is correct. Neanderthals did have a brain size around 1400cc and lived in the Near East and parts of Europe, with evidence of their existence dating back to between 100,000 and 40,000 years ago. Therefore, this statement is true.
4. **Evaluate Statement IV**:
- **Statement**: "Pre-historic cave art developed about 10,000 years ago."
- **Analysis**: This statement is also correct. Prehistoric cave art, such as that found in places like Lascaux, dates back to approximately 10,000 years ago or even earlier. Therefore, this statement is true.
### Conclusion:
After evaluating all four statements:
- Statement I: Incorrect
- Statement II: Incorrect
- Statement III: Correct
- Statement IV: Correct
Thus, **two statements (III and IV) are correct**.
### Final Answer:
The number of correct statements is **2**.
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