Consider the following characteristics with respect to Alpha particles:
1. They have large specific ionization values.
2. They dissipate their energy rather slowly.
3. They can penetrate the outer layer of human skin.
4. Their emitters are heavy elements.
Which of the above statements are correct?
1. 1 and 4 only
2. 1 and 3 only
3. 2 and 4 only
4. 2 and 3 only