The name of the foreign journalist who reported about Satyagraha at Dharsana salt works was

The answer is C, Webb Miller (the option is printed as 'Web Miller'). He was the American correspondent of the United Press who was present at the Dharasana salt works on 21 May 1930, when police lathi-charged unarmed satyagrahis led by Sarojini Naidu. His eyewitness dispatches reached the American and British press and shaped international opinion on the Salt Satyagraha.

Why the others are wrong:

• Mark Tully was a BBC correspondent who worked in India from the 1960s onward. He has no link to the 1930 events.
• Francis Louis and Philip Sprat do not appear in the record of Dharasana reporting, so they are distractors.

Core concept: the Civil Disobedience Movement, the Salt Satyagraha (Dandi march, March-April 1930) and the Dharasana raid that followed Gandhi's arrest. For Mains, this connects to the role of the press and international opinion in the freedom struggle and to the moral pressure built by non-violent resistance.

Trap: Aspirants often pick Mark Tully because he is the best-known foreign journalist associated with India. Anchor every such question to the year of the event before choosing a name.