Which Universe term is correctly associated with scientific fact: “it lies close to the north celestial pole”, and also with “a Cepheid variable star”?

Correct Answer: Option D — Polaris. Polaris is correct because it is it lies close to the north celestial pole. It is also associated with a Cepheid variable star. Together, these two facts identify Polaris precisely within Universe. Why the other options are incorrect: Option A — Betelgeuse: Betelgeuse is it is a variable star nearing a late evolutionary stage. It is also associated with a red supergiant star, so these facts identify Betelgeuse rather than Polaris. Option B — Crab Nebula: Crab Nebula is it contains the Crab Pulsar. It is also associated with a supernova remnant, so these facts identify Crab Nebula rather than Polaris. Option C — Black hole: Black hole is its gravity strongly bends spacetime. It is also associated with a region where escape velocity exceeds the speed of light, so these facts identify Black hole rather than Polaris. Exam Takeaway: Link Polaris with “it lies close to the north celestial pole” and “a Cepheid variable star” for quick revision.