Fill in the blank with an appropriate preposition:
Such a noisy environment was not conducive _____ a good night's sleep.

Conducive to: 
English Meaning - Providing the right conditions for something good to happen or exist. 
Bangla Meaning - শ্রেয়; সাহায্য কারক, সাহায্য কারী। 

Example Sentence: 
- Our mild climate is conducive to outdoor entertaining.

Complete Sentence - Such a noisy environment was not conducive to a good night's sleep. 

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