Q21Single correct4 Marks16 Oct 2022

If `n` is a positive integer, what is the output of the following code? Assume that natural numbers start from $1$, that is, $0$ is not a natural number. ``` a = n for i in range(1, n): a = a + i b = a for j in range(1, a): b = b * j print(b) ```

A

Sum of the factorial of the first $n - 1$ natural numbers

B

Factorial of the sum of the first $n - 1$ natural numbers

C

Sum of the factorial of the first $n$ natural numbers

D

Factorial of the sum of the first $n$ natural numbers