Fill in the blank with the correct preposition:'The negotiations between the two countries finally resulted ___ a historic peace treaty.'

Result in something (Phrasal verb): 
English Meaning - To cause a particular situation to happen.
Bangla Meaning - ডেকে আনা; পর্যবসিত হওয়া; বিশেষভাবে শেষ হওয়া।
Example Sentence - The fire resulted in damage to their property.

এছাড়াও, 
Result from - স্বাভাবিক পরিণতি লাভ করা; ফলে যাওয়া।
Example: His difficulty in walking results from a childhood illness.

তাই, সঠিক উত্তরটি হবে - The negotiations between the two countries finally resulted in a historic peace treaty.

Source: 
1. Cambridge Dictionary. 
2. Accessible Dictionary by Bangla Academy.