Q1Single correct3 Marks18 Dec 2025

Consider the following functions: ``` def p(n): if n < 10: return 1 return 1 + p(n // 10) def q(n): if n < 10: return n return n % 10 + q(n // 10) def r(n): if n <= 1: return 1 return n * r(n - 1) ``` Which of the following function calls returns the number of digits in $50!$, where $n!$ is the factorial of $n$?

A

p(q(50))

B

q(r(50))

C

p(r(50))

D

r(q(50))

E

r(p(50))