Solution

Emergency was proclaimed in response to petition filed by Raj Narain to declare Indira Gandhi’s election invalid.

(i) On June 25, 1975, the government declared the threat of internal disturbances to invoke Article 352 of constitution.

(ii) Article 352 can declare emergency on ground of either internal or external disturbances.

(iii) The government decided a grave crisis to be arisen to proclaim emergency to bring law and order, restore efficiency and implement pro-poor welfare programmes.

(iv) The President Fakhruddin Adi Ahmad proclaimed emergency which became the most controversial episode in Indian Politics.