• Green Building Rating and Certification Systems:
• LEED (Leadership in Energy and Environmental Design):
• Developed by the U.S. Green Building Council (USGBC), LEED is the most globally recognized green building certification and rating system evaluating sustainable site development, water efficiency, energy and atmosphere, materials and resources, and indoor environmental quality.
• Indian Context: IGBC (Indian Green Building Council) administers LEED India rating alongside its own indigenous green building rating programs, but LEED is the international standard rating system.
• Conclusion: Leadership in Energy and Environmental Design (LEED) (Option 2).

Correct option: (2) Leadership in Energy and Environmental Design (LEED)

• Family Ecosystem Perspective: Boundaries and Interfaces:
• Assertion (A): In the ecosystem perspective of a family, the area which separates a system area of influence from that of other systems is known as a boundary. $\implies$ Correct.
• In human ecological systems theory, a system boundary is an imaginary or tangible perimeter that demarcates the system (family) from its suprasystem (community, environment), regulating energy and information flow.
• Reason (R): A common or shared boundary between systems is called an interface. $\implies$ Correct.
• An interface is the specific point or zone where two systems or subsystems meet and interact (e.g., family-school interface, family-market interface).
• Conclusion: Both (A) and (R) are correct (Option 1).

Correct option: (1) Both (A) and (R) are correct

• Etiology of Salmonellosis Food Infection:
• Clinical Manifestations: Acute onset of watery diarrhea, severe abdominal cramps, nausea, and high fever starting 12 to 72 hours following ingestion.
• Food Infection vs Intoxication:
• Salmonella enterica causes a true food infection, invading the epithelial lining of the small intestine and colon and causing inflammatory enteritis.
• In contrast, Staphylococcus aureus, Clostridium botulinum, and Bacillus cereus primarily cause food intoxications mediated by preformed exotoxins (enterotoxin, neurotoxin), which typically produce rapid vomiting within 1–6 hours without sustained high fever.
• Conclusion: Salmonella (Option 4).

Correct option: (4) Salmonella

• International Earth Day Observance:
• Calendar Date: 22nd April is observed globally each year as Earth Day.
• Historical Background: First celebrated on April 22, 1970, initiated by US Senator Gaylord Nelson, giving birth to the modern environmental movement and leading to the creation of the US EPA and passage of landmark environmental protection laws worldwide.
• Other Dates:
• 22nd March: World Water Day
• 22nd May: International Day for Biological Diversity
• 5th June: World Environment Day
• Conclusion: 22nd April (Option 3).

Correct option: (3) 22nd April