The coefficient of x 4 in the expansion of (1 + x + x2 + x 3 ) 6 in powers of x, is

Question:
The coefficient of $x^{4}$ in the expansion of $\left(1+x+x^{2}+x^{3}\right)^{6}$ in powers of $x$, is

JEE Main Previous Year 2 Question of JEE Main from Mathematics Binomial Theorem chapter.

JEE Main Previous Year Sep. 05, 2020 (I)