C-10-Q046mediumsingle_mcqThe general term Tr+1T_{r+1}Tr+1 in the expansion of (x+y)n(x+y)^n(x+y)n is —anCrxryn−r^nC_r x^r y^{n-r}nCrxryn−rbnCrxn−ryr^nC_r x^{n-r} y^rnCrxn−ryrcnCr+1xn−ryr^nC_{r+1} x^{n-r} y^rnCr+1xn−ryrdnCrxnyr^nC_r x^n y^rnCrxnyr