which type of sentence is this? the platypus has venom - producing glands, which are rare among mammals, but…

which type of sentence is this? the platypus has venom - producing glands, which are rare among mammals, but its venom is not generally lethal to humans. simple compound complex compound - complex
Answer
Brief Explanations:
A compound - complex sentence has at least two independent clauses and at least one dependent clause. The independent clauses are "The platypus has venom - producing glands" and "its venom is not generally lethal to humans". The dependent clause is "which are rare among mammals" modifying "venom - producing glands".
Answer:
compound - complex