The correct answer is option 1: 1 and 2 only.

Let`s analyze each option to determine if the plant is a flowering plant:

Option 1: Cycas is not a flowering plant, but the Date palm is a flowering plant. So, option 1 is correct.

Option 2: The Date palm is a flowering plant, but the Pinus (pine tree) is a gymnosperm and does not produce flowers. Therefore, option 2 is incorrect.

Option 3: The Date palm is a flowering plant, but there is no mention of any other plants in this option. Therefore, option 3 is incorrect.

Option 4: The Cycas is not a flowering plant, the Date palm is a flowering plant, and the Pinus is not a flowering plant. Therefore, option 4 is incorrect.

Hence, the correct answer is option 1: 1 and 2 only, as only Cycas is not a flowering plant, while the Date palm is.