Explanation:

Lord Lytton’s Reactionary policies:
The short –sighted acts and policies of Lord Lytton acted like catalytic agents and accelerated the movement against foreign rule.

• The maximum age limit the I.C.S examination was reduced from 21 years to 19 years , thus making it impossible for Indians for compete for it.
• The grand Delhi Darbar of 1877, when the country was in the severe grip of famine , solicited remark from a Calcutta journalist that “Nero was fidding while Rome was burning .”
• Lytton put on the statute book two obnoxious measures- the Vernacular Press Act and Indian Arms Act (1878).
• Lytton’s unpopular acts provoked a great storm of opposition in the country and led to the organization of various political association for carrying on anti- Government propaganda in the country.

Note: The Third Anglo-Afghan War also known as the Third Afghan War, the British-Afghan War of 1919 and in Afghanistan as the War of Independence,[9] began on 6 May 1919 when the Emirate of Afghanistan invaded British India and ended with an armistice on 8 August 1919. The war resulted in the Afghans winning back control of foreign affairs from Britain, and the British recognizing Afghanistan as an independent nation

Hence only statements 2&3 are correct.