Now, you could be thinking that "which just one may be the best" can not be proper since it's a matter format. The solution is the fact that like all kinds of other equivalent phrases, the question format and the noun clause format look precisely the same: Consider this Ngram. https://alexismsydm.csublogs.com/43914204/helping-the-others-realize-the-advantages-of-drt-and-sarfaesi-lawyer-in-india