Wb JeePermutations And CombinationsWB JEE 2011MCQ+1 / -0.252011If \({}^n{C_4}\), \({}^n{C_5}\) and \({}^n{C_6}\) are in A.P., then n isA7 or 14B7C14D14 or 21Check AnswerClear SelectionReveal AnswerShow Explanation