Correct answer is B. The output can be calculated as 3 (2*4 + 3*5 + 4*6) = 3 (8 + 15 + 24) = 3 * 47 = 141. MLP or Multi Layer Perceptron is a class of feed forward artificial neural net. It comprises of at least 3 layers of nodes – input layer, hidden layer and output layer. Except the input node, each node is a neuron that uses a nonlinear activation function.