Open-source frameworks like TensorFlow, Scikit-learn, and XGBoost are widely used tools for building and training AI and machine learning models.
TensorFlow is an open-source deep learning framework developed by Google for building neural networks and other complex AI tasks.
Scikit-learn is a popular Python library for traditional machine learning tasks such as classification, regression, and clustering.
XGBoost is an open-source implementation of gradient boosting algorithms, highly effective for structured data tasks and competitions.
On the other hand, Apple Siri is not an open-source framework — it is a commercial virtual assistant product developed by Apple.
Siri uses AI and natural language processing to understand and respond to user commands, but it is not a framework for developers to build AI models.
Therefore, the correct answer is option (B) Apple Siri.