The following sentence contains it is not right to make a promise unless one is sure he can fulfill the promise. one adverb clause two noun clauses two adjective clauses one adverb and one adjective clause

I Would say that the most suitable option is 4 one adverb and one adjective clause.

ln fact, it is possible to find 3 clauses within this sentence:
1° It is not right to make a promise (independent clause) 
2° unless one is sure he can fulfill the promise. (dependent clause). and 3° he
can fulfill the promise (dependent clause within the other clause) 
Let´s take the most prominent clauses: number 1 would be the adjective clause because of the 'right and n° 2 would be the adverbial clause because it is modifying the adjective clause. 

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