Option 1: This option suggests that banana leaf gives a fresh flavor to milk. However, this statement is not true. Banana leaves do not have any specific flavor that can be transferred to the milk. Therefore, option 1 is incorrect.

Option 2: This option claims that banana leaf makes the milk acidic and resistant to yeast. While banana leaves do have some natural acidity due to the presence of tannins, the amount is very minimal and unlikely to significantly influence the acidity of the milk. Additionally, banana leaves do not have any properties that make milk resistant to yeast. Hence, option 2 is incorrect.

Option 3: This option correctly states that banana leaf makes the milk basic and resistant to yeast. Banana leaves contain certain compounds that can increase the pH level of the milk, making it slightly alkaline. This higher pH can inhibit the growth of yeast and other microorganisms. Therefore, option 3 is the correct answer.

Option 4: This option suggests that banana leaf increases the whiteness of milk. However, there is no scientific evidence to support this claim. The color of milk primarily depends on its fat content and processing, not on the presence of a banana leaf. Thus, option 4 is incorrect.

In conclusion, the correct answer