The structure of tiglic acid is $\text{CH}_3\text{CH} = \text{C(CH}_3)\text{CO}_2\text{H}$. Which of these statements about the properties of a single molecule of this acid are correct?
- A1, 2 and 3 are correct
- B1 and 2 only are correct
- C2 and 3 only are correct
- D1 only is correct