• Aminopeptidases are secreted by the small intestine and pancreas; statement I is partially correct.
• Ameloblasts secrete enamel during tooth development; statement II is correct.
• Human milk teeth formula = 2102/2102; statement III is correct.
• Liver is the largest gland but considered exocrine, endocrine function is minor; statement IV is incorrect.
• Hence correct statements: II, III.