हाल ही में केंद्र सरकार ने नई चीनी मिलों के बीच कम से कम कितनी दूरी का प्रस्ताव दिया है?

The question asks about the minimum distance proposed by the central government between new sugar mills.

Step 1: Understand the question. The question, "हाल ही में केंद्र सरकार ने नई चीनी मिलों के बीच कम से कम कितनी दूरी का प्रस्ताव दिया है?" translates to "Recently, what minimum distance has the central government proposed between new sugar mills?"

Step 2: Recall or research the relevant government policy. The existing policy by the central government mandates a minimum distance of 15 kilometers between two sugar mills. However, the question specifically asks about a proposal (प्रस्ताव).

Step 3: Identify any proposals for a different distance. In the past, specifically around 2013-2014, the central government's Food Ministry had proposed increasing this minimum distance from 15 kilometers to 25 kilometers to ensure better sugarcane availability for existing mills and prevent unhealthy competition. While the 15 km rule generally remained in effect, 25 km was indeed a proposed distance.

Step 4: Compare with the given options. The options are:

• 50 किलोमीटर (50 kilometers)
• 10 किलोमीटर (10 kilometers)
• 25 किलोमीटर (25 kilometers)
• 17 किलोमीटर (17 kilometers)

Considering the historical proposal by the central government to increase the distance to 25 kilometers, this option aligns with the term "proposed" in the question.

The final answer is $\boxed{25 किलोमीटर}$.