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Which node is the root node of the following K-ary tree?

(a) A

(b) B

(c) C

(d) D

I want to ask this question from K-ary tree in portion Trees of Data Structures & Algorithms I

I have been asked this question by my college director while I was bunking the class.

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Right option is (a) A

To explain: Node A is called the root node of the above K-ary tree while the Node B, Node C, Node D are called Leaf node.

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