Mahatma Gandhi suspended the non co-operation movement in February 1922 after the incident of Chouri-Choura. Who described it as a Nationa Calamity ?

• A. Pandit Motilal Nehru
• B. Lala Lajpat Rai
• C. Subhash Chandra Bose
• D. Pandit Jawaharlal Nehru