[" 2.If the binomial co-efficient of "r"...

[" 2.If the binomial co-efficient of "r" th,"(r+1)" th and "(r+2)" th terms in the expansion "d(1+x)" " are is "],[" A.P.,then the value of "r" is "],[[" (A) "10," (B) "6," (B) "6]]

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