TS EAMCET Medical 2018 May 2 Shift 2 Paper

Which of the following statements is/are correct for the reaction?
(-)-2-methyl-l-butanol

conc.HCl∕Δ

→

(+)-l-chloro-2-methyl butane
a) It proceeds with inversion of configuration
b) It proceeds with retention of configuration
c) Reactant and product differ with respect to rotation of plane polarized light