Which of the following compounds will show geometrical isomerism?
1. 2-butene
2. propene
3. 1-phenylpropene
4. 2-methylbut-2-ene
(a) 1, 2
(b) 3, 4
(c) 1, 2, 3
(d) 1, 3
[IIT, 1998]