Function syntax

Which of the following functions will return the square of a number passed as an argument?

Choose the correct option:

• Listing 1 (a)
• Listing 1 (b)
• Listing 1 (c)
• Listing 1 (d)

Listing 1: Square number function.

(a)

def sqr(num):
    result = num ** 2

(b)

def sqr(num):
    return
    result = num ** 2

(c)

def sqr(num):
    return num ** 2

(d)

def sqr(num):
    result = num ** 2
    return