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$If the sum of the coefficients in the expansion of (x - 2 y + 3 z)^{n}, n \in ℕ is 128, then the$ $greatest coefficient in the expansion of (1 + x)^{n} is$

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Correct option is A

Sum of the coefficients in the expansion(x−2y+3z)n is (1−2+3)n=2n (∵ Put x=y=z=1) i.e. 2n=128⇒n=7 therefore, greatest coefficient in the expansion of (1+x)7 is 7C3 or 7C4⇒7C3=7C4=35

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If the sum of the coefficients in the expansion of (x−2y+3z)n,n∈ℕ is 128 , then the greatest coefficient in the expansion of (1+x)n is

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$If the sum of the coefficients in the expansion of (x - 2 y + 3 z)^{n}, n \in ℕ is 128, then the$ $greatest coefficient in the expansion of (1 + x)^{n} is$