下面哪个分类器可以正确分类所有点（正样本：圆圈，负样本：三角)
1. Logistic regression
2. SVM with linear kernel
3. SVM with RBF kernel
4. Decision tree
5. 3-nearest-neighbor classifier (with Euclidean distance).
2. SVM with linear kernel
3. SVM with RBF kernel
4. Decision tree
5. 3-nearest-neighbor classifier (with Euclidean distance).
