1.If the coefficients of three consecutive terms in the expansion of (1+x)n(1 + x)^n(1+x)n are in the ratio 1:5:201 : 5 : 201:5:20, then the coefficient of the fourth term is:a.243624362436b.548154815481c.182718271827d.365436543654Login to continueOnly logged in users canattempt or see the solution.
