Assertion: The addition of HBr on 2-butene gives two isomeric products. Reason: Addition of HBr on 2-butene follows Markownikoff’s rule.

The addition of HBr on 2 butene gives the only single product. It does not give two isomeric products and it is a symmetric alkene so it does not take place by Markownikoff’s rule. According to Markownikoff’s rule, the negative part of the reagent goes to that carbon-carbon double bond which has less number of hydrogen atoms attached to it but it does not apply here as it is symmetrical alkene. HBr CH CH CH CH CH CH CH CH 3 3 3 2 3 | Br → Hence, the correct option is (d).