Explain the following terms:
(a) Defection
(b) Affidavit
(c) Ruling Party.
(a) Defection: Changing party allegiance from the party on which a person got elected to a different party.
(b) Affidavit: A signed document submitted to an officer, where a person makes a sworn statement regarding his/her personal information.
(c) Ruling Party: Political party that runs government.
Mention three National Parties of India.