The decreasing order of reactivity of the following alkenes towards HBr addition is

• A

  I>II>III>IV
• B

  II>IV>I>III
• Correct answer
  C

  III>IV>I>II
• D

  III>I>II>IV

Solution

Thus stability order of carbocation III > IV > I > II

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