✅ Correct Answer: Hydrogen
Source: This question is taken from the Assistant Sub Inspector in the Punjab Police Department
Source: This question is taken from the Assistant Director Labour Welfare ppsc past papers
✅ Correct Answer: Copper
Source: This question is taken from the Assistant BS-16 & Junior Clerk BS-11 Agriculture Department
Source: This question is taken from the Assistant Director Labour Welfare Bs-17 HR Department