Consider the following statements about antihistamines:
1. Antihistamines are drugs that treat allergic rhinitis, the common cold, influenza, and other allergies.
2. They compete with histamine for binding sites of receptors where histamine exerts its effect.
Which of the above statement is correct?
1
1 only
2
2 only
3
Both 1 and 2
4
None of the above