Which of the following is not preserved under a reflection?

i. orientation
ii. parallelism
iii. colinearity
iv. angle measure
a. ii and iii
b. ii, iii, and iv
c. i only
d. i and ii

Reflection is the way of projecting a mirror figure to the other side of the axis of symmetry. When reflection is done, like what we can observe in the mirrors, the properties that can be observed are parallelism, colinearity and angle measure. Orientation is not preserved. Answer is C