Question: Are data model bias and variance a challenge with unsupervised learning?

1. No, data model bias and variance are only a challenge with reinforcement learning.
2. Yes, data model bias is a challenge when the machine creates clusters.
3. Yes, data model variance trains the unsupervised machine learning algorithm.
4. No, data model bias and variance involve supervised learning.

Answer: The correct answer of the above question is Option B:Yes, data model bias is a challenge when the machine creates clusters.