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Self Organizing Maps are

1. A type of satistical tool for data analysis
2. A type of Aritificial Neural Networks
3. A type of particle Swarm Algorithm
4. None of the above

self-organizing map (SOM) is a type of artificial neural network (ANN) that is trained using unsupervised learning to produce a low-dimensional (typically two-dimensional), discretized representation of the input space of the training samples, called a map, and is therefore a method to do dimensionality reduction.

So, the correct answer is $(B).$

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