If ""^(n)P(r) = ""^(n)P(r+1) and ""^...

If ` ""^(n)P_(r) = ""^(n)P_(r+1) ` and ` ""^(n)C_(r) = ""^(n) C_(r-1) ` then the value of r is equal to

A

1

B

4

C

2

D

3

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