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What is the time complexity of matrix multiplied recursively by Divide and Conquer Method?

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What is the time complexity of matrix multiplied recursively by Divide and Conquer Method?

(a) O(n)

(b) O(n^2)

(c) O(n^3)

(d) O(n!)

I got this question by my school principal while I was bunking the class.

This interesting question is from Recursion topic in section Recursion of Data Structures & Algorithms II

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Correct option is (c) O(n^3)

Best explanation: The time complexity of recursive multiplication of two square matrices by the Divide and Conquer method is found to be O(n^3) since there are total of 8 recursive calls.

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