The aromatic compound among the following is :

The molecule that exhibits non-planarity is:
 

1.		2.
3.		4.

The aromatic compound among the following is:-

1.		2.
3.		4.

Which of the following has a zero dipole moment?

1.  1-butene

2.  cis-2-butene

3.  trans-2-butene

4.  2 methyl-1-propene 

The hydrocarbons having the lowest dipole moment among the following is:

1. 

2. CH₃ - C ≡ C - CH₃

3. CH₃ CH₂ CH = CH₂

4. CH₂ = CH - C ≡ CH