The correct option is A Internal conflicts in the party.
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Chittaranjan Das died in June 1925. After his death, the party became feeble. Few members of the Swarajya Party started to change their sides, and supported the government. Others established the National Party, a new political outfit. Leaders like Bipinchandra Pal and Surendranath Bannerji strongly criticised the party. In the election of 1926, the party lost terribly, except in the Madras province.