✅ Correct Answer: Oil
Source: This question is taken from the Punjab Police Constables Past Papers 2022-23
✅ Correct Answer: 1960
Source: This question is taken from the Combined Competitive Examination (PMS) 2015 Paper General
✅ Correct Answer: High density
Source: This question is taken from the Manager Auqaf (Bs-16) PPSC Past Paper 2022