Fill in the blank with an appropriate preposition:
College coaches have to adhere ____ the rules about recruiting high school students.

Adhere to: 
English Meaning - To continue to obey, believe in, or support something, esp. a custom or belief. 
Bangla Meaning - (আনুষ্ঠানিক) (১) দৃঢ়ভাবে লেগে থাকা, সেঁটে থাকা।
(২) বিশ্বস্ত/ অনুগত/ অবিচল থাকা; বিচ্যুত না-হওয়া; দৃঢ়ভাবে সমর্থন করা: adhere to an opinion.

Example Sentences: 
- She adhered to her principles/ideals throughout her life.
- They failed to adhere to the terms of the agreement/treaty.

Complete Sentence - College coaches have to adhere to the rules about recruiting high school students. 

Source: Cambridge Dictionary.