Explanation:

The Sabarmati Ashram (also known as Harijan or Satyagraha Ashram) was home to Mohandas Gandhi from 1917 until 1930 and served as one of the main centres of the Indian freedom struggle.
Statement 1: This was Sevagram cottage (not Sabarmati Ashram). Gandhiji left to Delhi from Sevargam Cottage in 1946 and then went to Noakhali. From there he did not return to Sewagram while engaged in his task of communal unity and peace making. He was martyred in Delhi in 1948.
Statement 2 and 3: It is common knowledge.

On his return from South Africa, Gandhi’s first Ashram in India was established in the Kochrab area of Ahmedabad in 1915. The Ashram was then shifted in 1917 to a piece of open barren land on the banks of the river Sabarmati. Reasons for this shift included: he wanted to do some experiments in living eg farming, animal husbandry, cow breeding, Khadi and related constructive activities, for which he was in search of this kind of barren land. The Prime Minister has recently released the coin and postal stamp in the honour of Shrimad Rajchandraji on his 150th birth anniversary at Abhay Ghat. Shrimad Rajchandraji is best known for his teachings on Jainism and his spiritual guidance to Mahatma Gandhi.