The correct options are
B Independent candidates are not affiliated to any political party.
D Candidates from registered political parties need both nomination papers and a party ticket to contest in elections.
For an independent candidate, the nomination papers are enough to contest in the elections. Independent candidates are not affiliated to any political party. For candidates of registered political parties, they need a party ticket in addition to the nomination papers. These candidates get to use their party symbol. The political party supports his or her election.