Which poultry are birds farmed to produce eggs?

The correct answer is Option 3: Layers.

Poultry farming involves raising domesticated birds for their meat, eggs, or feathers. Based on their primary purpose in production, chickens (poultry) are broadly categorized into two main types:
1. Layers: Female birds (hens) that are specifically raised and maintained for the purpose of egg production.
2. Broilers: Birds that are grown and fed specifically for meat production.

Let's look at the options provided:
• Milch: Refers to milk-producing farm animals such as cows or buffaloes, not poultry.
• Common carp: A species of freshwater fish used in aquaculture, not a poultry bird.
• Layers: Birds raised specifically for laying eggs.
• Broilers: Birds raised specifically for meat production.

Therefore, poultry birds farmed to produce eggs are known as Layers.