Geometrical isomerism can be shown by:

1.
2.
3.
4.

The compounds that show geometrical isomerism among the following are:

a. 2-Butene

b. Propene

c. 1-Phenylpropene

d. 2-Methylbut-2-ene

1. a, b

2. c, d

3. a, b, c

4. a, c

The chiral compound among the following is:

The optically active compound among the following is-