The IUPAC name of
is

• A

  4-ethyl-5,6,7,9-tetramethyldeca-2, 9-diene
• Correct answer
  B

  7 -ethyl $-2,4,5,6$-tetramethyldeca- 1,8 -diene
• C

  7-ethyl-2,4,5,6-tetramethyldeca-1,7-diene
• D

  7 -(1-propenyl)- $2,3,4,5$-tetramethyl non-1-ene

Solution

The correct IUPAC name is 7 -ethyl- $2,4,5$, 6 -tetramethyldeca- 1,8 -diene

Hence, the correct answer is option: 'B'.