___連絡をお待ちしております。
Q. Which prefix correctly attaches to 連絡 in polite correspondence?
Translation
We look forward to hearing from you.
Explanation
As a rule of thumb, ご attaches to Sino-Japanese (on-reading) nouns like 連絡, 案内, 説明, while お attaches to native words (お名前, お手紙). ご連絡 is the standard business form.