Identify B and C respectively in following conversion.

Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.
Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA
Osmium tetraoxide is an oxidising agent oxidize alkene into diols and diols in acidic medium accept proton to form good leaving group water and to sablize carbocation, ring expansion occur.
