Explanation:

- Let's start by calculating the total number of Lily and Sunflower sold in January:

- Lily in January = 60

- Sunflower in January = 80

- Total in January = 60 + 80 = 140

- Now, calculate the total number of Rose and Lily sold in March:

- Rose in March = 80

- Lily in March = 120

- Total in March = 80 + 120 = 200

- Find the ratio of the totals:

- Ratio = 140 : 200

- Simplify the ratio:

- Divide both sides by 20:

- 140 ÷ 20 = 7

- 200 ÷ 20 = 10

- Simplified ratio = 7 : 10

- Based on our calculations, the correct answer is Option 4: 7 : 10.