Solution:
Given ratio 12 yard to 20 feet,
To simplify the ratio, we first need to find the common multiples of 12 and 20,
to find the common multiples of 12 and 20, we need to factorise 12 and 20.
On factorisation, we get
and
.
Common multiples of 12 and 20 are
that is 4.
And now simplifying the given ratio, 12 yard to 20 feet , that is 
Hence, Option A. 3:5 simplified ratio correctly compares 12 yard to 20 feet.