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Consider the strings “PQRSTPQRS” and “PRATPBRQRPS”. What is the length of the longest common subsequence?

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Consider the strings “PQRSTPQRS” and “PRATPBRQRPS”. What is the length of the longest common subsequence?

(a) 9

(b) 8

(c) 7

(d) 6

This question was addressed to me in quiz.

My doubt stems from Longest Common Subsequence in section Dynamic Programming of Data Structures & Algorithms II

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The correct option is (c) 7

For explanation: The longest common subsequence is “PRTPQRS” and its length is 7.

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