Q17: Pakistan Affairs MCQ 2018

**The lens used to correct short-sightedness is:**A) Concave polygonB) Concave prescription lensesC) Concave mirrorD) None of these Show Answer Correct Answer: B – Concave prescription lenses

**The unavailability of internal energy for conversion into mechanical work is called:**A) EntropyB) ThermodynamicsC) NegentropyD) None of these Show Answer Correct Answer: A – Entropy

**Anaemia is caused in man due to the deficiency of:**A) Folic acidB) Vitamin AC) Vitamin B12D) Iron Show Answer Correct Answer: C – Vitamin B12

**Who proposed the concept “All motion is relative”?**A) Albert EinsteinB) John KeplerC) Galileo GalileiD) None of these Show Answer Correct Answer: A – Albert Einstein