The answer is d) / x4 ÷ 4.
To show my thinking, I will use the distributive property to simplify the expression.
5 = (1/2 x 1/1/20) + (²/3 + 2/1/1/0 4)
= (1/2 x 1/1/20) + (1/2 x 4)
= (1/2 x 1/1/20) + (1/2 x 4/1)
= (1/2 x 1/1/20) + (1/2 x 4/1) ÷ 4
= (1/2 x 1/1/20 ÷ 4) + (1/2 x 4/1 ÷ 4)
= (1/2 x 1/4/80) + (1/2 x 1/4)
= (1/8 x 1/80) + (1/8)
= 1/8 + 1/8
= / x4 ÷ 4