Option B is correct because the Election Commission does not nominate candidates. According to the context, the EC 'determines the timing of elections and prepares the election schedule' which includes 'date from which nominations can be filed, last date for filing nominations, last date of scrutiny.' This clearly shows that the EC only sets the schedule for nominations and scrutinizes them, but does not nominate candidates. Candidates are nominated by political parties or file their own nominations. The EC's role is limited to supervising the nomination process, not participating in it. Additionally, Option E (Supervising Panchayat elections) is also not performed by the Election Commission of India, as the context only mentions Lok Sabha elections, State assembly elections, and by-elections being conducted by the EC. Panchayat elections are supervised by State Election Commissions, not the Election Commission of India.