The question asks about the year in which the Parliament of Religions was held in Chicago. Let's analyze the options provided to identify the correct answer.

• Option 1: 1983
  This date does not align with the historical period when the first Parliament of Religions was known to have occurred.
• Option 2: 1839
  This date is too early historically, as the concept of a World Parliament of Religions was conceived much later in the 19th century.
• Option 3: 1894
  While this date is close, it is not the exact year of the significant event we are discussing.
• Option 4: 1893
  This is the correct year when the first Parliament of the World's Religions was held in Chicago. The event took place from September 11 to September 27, 1893, and marked a significant moment in interfaith dialogue, with Swami Vivekananda being one of the notable speakers who represented Hinduism.

The correct answer is indeed 1893, as this is historically verified and recorded.

Additional context: The event is renowned because Swami Vivekananda's speech made a substantial impact and is still remembered for its powerful message on religious tolerance and unity. This occasion was the first attempt to bring representatives from various world religions together to promote mutual understanding and respect.

Hence, the correct answer is 1893.