Each question consists of four sentences on a topic. Some sentences are…

Concept: Certain verbs and adjectives take one fixed preposition, and swapping it for another is a grammatical error. Two such fixed patterns are tested here: "plead guilty to" (a charge) — never "of" — and "sentenced to" a term of imprisonment — never "for". By contrast, "found guilty of" (a crime) is the correct pairing after the verb "found".

Application: Checking each sentence: A. "Harish told Raj to plead guilty" uses the standard "told + object + to-infinitive" pattern — no preposition error. B. "Raj pleaded guilty of stealing money from the shop" wrongly uses "of" after "pleaded guilty"; it should read "pleaded guilty to stealing money from the shop" — this is an error. C. "The court found Raj guilty of all the crimes he was charged with" correctly pairs "found" with "guilty of" — no error. D. "He was sentenced for three years in jail" wrongly uses "for"; it should read "sentenced to three years in jail" — this is an error. So the grammatically incorrect sentences are B and D.

Contrast:

• "A and B" — wrongly includes sentence A, which correctly uses "told...to plead"; the combination also misses another sentence in the passage that has the same kind of preposition error.

• "A, C and D" — wrongly includes both sentence A and sentence C, which correctly use "told...to" and "found guilty of" respectively; only part of what is listed is actually erroneous.

• "B, C and D" — wrongly includes sentence C, which correctly pairs "found" with "guilty of"; adding a correct sentence to the list makes the combination inaccurate.

Cross-check: Applying the two fixed patterns "plead guilty to" (a charge) and "sentenced to" (a term) consistently, alongside the reverse pairing "found guilty of" (a crime) after "found", confirms B and D as the only two sentences that misuse their preposition.