Lachrymal glands, also called tear glands, are specialized exocrine glands located above each eye that secrete tears. Tears keep the eyes moist, wash away dust and debris, and contain enzymes (like lysozyme) that help prevent infection. Options B (mucous), C (pus), and D (hormones) are secretions from different types of glands - mucous membranes, inflammatory responses, and endocrine glands respectively.