Answer:
b. oval
Step-by-step explanation:
A galaxy is usually defined as a system that is comprised of infinite stars, planets, solar systems, interstellar gases, and dust particles. It is extremely large and covers a large portion in space. For example, the milky way galaxy is comprised of the solar system, the sun and the earth, and where life exists.
These galaxies are often characterized by a particular type of shape. This includes-
(1) Spiral type of galaxy
(2) Elliptical type
(3) Irregular type
(4) Spiral barred type
There is no oval type of galaxy discovered so far. So, it cannot be considered as a galaxy.
Thus, the correct answer is option (B).