Which of the following muscle lies between superficial and deep pas of submandibular salivary gland?

Submandibular gland is a large salivary gland situated in the anterior pa of the digastric triangle. It is roughly J-shaped,being indented by the posterior border of the mylohyoid which divides into a larger pa superficial to the muscle,and a small pa lying deep to the muscle. Reference: B D Chaurasia's human anatomy; 5th edition, page.166.