The group of stars arranged in a definite pattern is called

The correct answer is B) Constellation. A constellation is a recognised pattern of stars as seen from Earth, usually named after a mythological figure, animal or object. The International Astronomical Union fixed 88 modern constellations and their boundaries in 1930. Indian tradition uses a parallel idea in the 27 nakshatras, which is a useful link for the Art and Culture and Science sections.

• A) Milky Way: This is our own galaxy, a vast system of billions of stars, gas and dust. It is not a designed pattern. We see its band of light from inside it.
• C) Andromeda: This is a trap. Andromeda is a constellation, and it is also the name of a separate galaxy (M31). Neither is the general term the question asks for.
• D) Solar System: This is the Sun with its planets, moons, asteroids and comets, bound by the Sun's gravity. It is not a pattern of stars.

Trap: Aspirants pick Andromeda because it sounds like a star group. The question asks for the general category, and the specific name is a distractor.