Assertion: Liver secretes bile juice that does not contain enzymes but helps in digestion.Reason: Bile carries out emulsification of fats and provides an alkaline medium for activity of other enzymes.A. Both assertion and reason are correct and reason is the correct explanation for assertion.B. Both assertion and reason are correct but reason is not the correct explanation for assertion.C. The assertion is incorrect but the reason is correct.D. Both assertion and reason are incorrect.

The correct option is:

A. Both assertion and reason are correct, and reason is the correct explanation for the assertion.

Explanation:
The assertion states that the liver secretes bile juice that does not contain enzymes but helps in digestion. This statement is correct. Bile is a fluid secreted by the liver and stored in the gallbladder, and it does not contain enzymes.

The reason states that bile carries out emulsification of fats and provides an alkaline medium for the activity of other enzymes. This statement is also correct. Bile plays a crucial role in the digestion and absorption of fats by emulsifying them into smaller droplets, increasing their surface area for the action of lipase enzymes. Additionally, bile also helps create an alkaline environment in the small intestine, which is necessary for the optimal activity of pancreatic enzymes.

Therefore, both the assertion and the reason are correct, and the reason provides a correct explanation for the assertion.