Perfect Square

Which of the following is a perfect square?

A. \(98!\times99!\)

B. \(99!\times100!\)

C. \(98!\times100!\)

D. \(100!\times101!\)

E. \(99!\times101!\)

Notation: ! Is a factorial notation, for example, \(3! = 3\times 2\times 1\)

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