English grammar error-spotting (reported clause after ‘‘thought’’; tense backshift and relative ‘‘whosoever’’): Read the sentence in parts (A–D) and identify the erroneous part; if none, pick ‘‘No error.’’ Ensure correct tense and clause embedding: ‘‘She was told / to give the award to whosoever / she thought has done the most for the downtrodden. / No error.’

Given data

• Main reporting: ‘‘She was told’’ (past)
• Embedded judgment: ‘‘she thought …’’ (past)
• Inside that, a perfect: ‘‘has done’’

Concept / Approach
After a past reporting verb (‘‘thought’’), backshift or use a timeless form consistently. Here, the present perfect ‘‘has done’’ conflicts with the past-time frame. Use a past perfect (had done) or a past (did), and place the verb immediately after the relative pronoun to avoid an extra ‘‘that’’.

Step-by-step correction reasoning
Preferred exam fix: ‘‘… whosoever she thought had done the most …’’

Corrected version
‘‘She was told to give the award to whosoever she thought had done the most for the downtrodden.’’

Common pitfalls

• Leaving ‘‘has done’’ after a past reporting verb.
• Inserting unnecessary ‘‘that’’ after ‘‘whosoever’’.

Final Answer
she thought has done the most for the downtrodden.