Pick out the correct statement from the following and choose the correct answer from the codes given below

1. Hexa-1, 5-diene is a conjugated diene

2. Prop-1, 2-diene is conjugated diene

3. Hexa-1, 3-diene is a conjugated diene

4. Buta-1, 3-diene is an isolated diene

5. Prop-1, 2-diene is a cumulative diene

What is the IUPAC name for the following compound?

The stability order of the given alkenes is

The major product of the following reaction is:

The structure of $3$-methylpent-$2$-ene is

The major product of the following reaction is:

The major product in the following conversion is

What is the IUPAC nomenclature of the given compound ?