Step 1: National Mission on Enhanced Energy Efficiency (NMEEE).
- Objective: To enhance energy efficiency in energy-intensive industries. - Specific focus: reducing energy consumption in major industries via programs like PAT (Perform, Achieve and Trade). \[P \Rightarrow 3\]
Step 2: National Mission on Sustainable Habitat.
- Focus: urban planning, transportation, and waste management. - Includes implementation of vehicle fuel economy standards through economic incentives to cut emissions. \[Q \Rightarrow 5\]
Step 3: National Water Mission.
- Goal: To boost water use efficiency by 20% via pricing and demand management. - Thus, objective = achieve a 20% increase in water use efficiency through pricing. \[R \Rightarrow 4\]
Step 4: National Mission on Strategic Knowledge for Climate Change.
- Focus: R&D, skill development, and establishing climate research funds. - Objective = obtain a deeper understanding of climate science and its effects. \[S \Rightarrow 1\]
Step 5: Final alignment.
Consequently, the correct order is: \[P-3, \; Q-5, \; R-4, \; S-1\] This corresponds to Option (A).
Final Answer: \[\boxed{\text{(A) P-3, Q-5, R-4, S-1}}\]