A group of stars which form a recognizable pattern or shape is called :
constellation
Explanation for correct answer:
Option B -
Explanation for incorrect answer:
Option A - A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter.
Option C - An asteroid is a minor planet of the inner Solar System. They are metallic or rocky bodies without atmospheres.
Hence option B is correct.