• Pullet Output of Commercial Layer Parent Stock:
• single female parent breeder (dam) of commercial egg-type stock (e.g., BV-300, Bovans, Hy-Line) produces approximately $280\text{ to }300\text{ total eggs}$ up to 72 weeks of age.
• With $90\%$ settable eggs, $85\%$ hatchability of fertile eggs, and a $50:50$ sex ratio at vent sexing:

Correct option: (3) 135

• Classification of Capital in Farm Economics:
• Fixed Capital (Durable Investment): Long-lasting physical assets that provide services across multiple production cycles without being consumed in a single cycle (e.g., land, sheds, brooders, cages, incubators, feed mill equipment).
• Working / Variable / Recurring Capital: Operating expenditures consumed within a single cycle (e.g., feed, day-old chicks, litter, vaccines, electricity).

Correct option: (2) Fixed Capital

• Atmospheric Ammonia ($NH_3$) Threshold in Poultry Housing:
• According to poultry health and welfare guidelines:
• The maximum permissible ambient ammonia concentration in a poultry house is $25\text{ ppm}$ (ideal level $\lt 10\text{--}15\text{ ppm}$).
• Concentrations exceeding $25\text{ ppm}$ paralyze respiratory cilia, damage the tracheal mucosa, and predispose birds to airsacculitis and Newcastle disease / infectious bronchitis; levels above $50\text{ ppm}$ cause blindness (keratoconjunctivitis) and growth depression.

Correct option: (3) 25 ppm