Explanation:

Let's break down the problem to find the ratio of alcohol to water when both mixtures are combined into a jug:

- In the first glass:

- Alcohol = 2/5

- Water = 3/5

- In the second glass:

- Alcohol = 1/4

- Water = 3/4

- Assume both glasses have the same volume, say V.

- Alcohol in the jug = (2/5)V + (1/4)V = (8/20)V + (5/20)V = (13/20)V

- Water in the jug = (3/5)V + (3/4)V = (12/20)V + (15/20)V = (27/20)V

- The ratio of alcohol to water in the jug: (13/20)V : (27/20)V = 13 : 27

- Option 1: 13 : 27 is correct.

Therefore, the correct answer is:

Option 1: 13 : 27