What is subset selection in feature selection?

Subject: Machine Learning

Topic: Statistical Learning and Feature Engineering

Options:

1. Option A: Selecting a random subset of features.
2. Option B: Selecting the best subset of features based on some criterion.
3. Option C: Selecting all features from the dataset.
4. Option D: Selecting features based on their alphabetical order.

Correct Answer:

Option B: Selecting the best subset of features based on some criterion.

Explanation:

Subset selection involves searching through the space of possible feature subsets to find the optimal subset that maximizes some evaluation criterion (e.g., accuracy, AIC).