• Ex-situ vs. In-situ Wildlife Conservation:
• Ex-situ Conservation: Off-site conservation where endangered animals or germplasm are maintained outside their natural evolutionary habitat in human-managed facilities (e.g., Zoological Parks, safaris, breeding centers, gene banks, cryobanks).
• In-situ Conservation: On-site conservation within natural ecosystems and habitats (e.g., National Parks, Wildlife Sanctuaries, Biosphere Reserves, Community Reserves).

Correct option: (4) Zoological park

• Largest Deer Species in the Indian Subcontinent:
• The Sambar (Rusa unicolor) is the largest cervid (deer) species found in India and Southeast Asia.
• Adult Weight and Size: Mature males weigh between $200\text{ to }320\text{ kg}$ with a shoulder height of up to $160\text{ cm}$ and rugged three-tined antlers exceeding $100\text{ cm}$.
• Comparison: Barasingha (Swamp deer) weighs $160\text{--}180\text{ kg}$, Cheetal (Spotted deer) weighs $40\text{--}80\text{ kg}$, and Barking deer (Muntjac) weighs only $15\text{--}30\text{ kg}$.

Correct option: (1) Sambhar

• American Class Chickens: Lay brown-shelled eggs, have yellow skin, and red earlobes (e.g., Plymouth Rock, Rhode Island Red, New Hampshire). (True)
• Mediterranean Class Chickens: Lay white-shelled eggs, have non-feathered shanks, and white earlobes (e.g., Single Comb White Leghorn, Minorca). (True)
• Asiatic Class Chickens: Possess heavily feathered shanks, yellow skin, red earlobes, and lay brown-shelled eggs (e.g., Brahma, Cochin, Langshan). (True)
• English Class Chickens: Have red earlobes (not white) and white skin (except Cornish which has yellow skin). (False)
• Conclusion: Statements (A), (B), and (C) are correct.

Correct option: (2) (A), (B) and (C) only,