Question

Какая линия московского метрополитена самая старая? 1. Сокольническая 2. Замоскворецкая 3. Кольцевая 4. Филёвская

Answer 1

Первая линия шла от станции «Сокольники» 

Answer 2

Вариант ответа- Сокольническая

Answer 3

The Oldest Line of the Moscow Metro

The oldest line of the Moscow Metro is the Sokolnicheskaya Line.

This information is supported by a search snippet from Source which states that the Sokolnicheskaya Line is the second and fourth lines of the Moscow Metro, and Source which mentions that the Sokolnicheskaya Line is the first and oldest line of the Moscow Metro.

So, based on the search results, the Sokolnicheskaya Line is indeed the oldest line of the Moscow Metro.