The erectile tissue which forms the corpus cavernosum of the penis . . . 1. is innervated by the sympathetic nervous system 2. is formed by the erectile tissue of the crus . . . 3. contains a segment of the urethra 4. is compressed by the ischiocavernosus muscle Group of answer choices (A) 1 only (B) 2 only (C) 2 and 3 (D) 3 only (E) 2 and 4 (F) 4 only

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