Concept:The question tests the ability to spot grammatical errors in two of the four given parts of a sentence.
Explanation:Part (A) contains an error in verb form.
The phrase "was schedule" is incorrect because the sentence is in the passive voice and past simple tense.
The correct passive structure is "was/were + past participle (V3)".
Therefore, "schedule" should be replaced with "scheduled".
Part (B) is grammatically correct as "to take place but due to the COVID-19 pandemic" has no error.
Part (C) contains an error in the use of the article.
The tournament has already been mentioned in part (A), so it is a specific noun.
Thus, the indefinite article "a" is wrong, and the definite article "the" must be used.
So "a tournament" should be "the tournament".
Part (D) is correct because "with the intended host changed to India" is grammatically sound.
Corrected sentence: The 2020 edition of the tournament was scheduled to take place but due to the COVID-19 pandemic, the tournament was postponed until 2021, with the intended host changed to India.
Answer:The erroneous parts are (A) and (C), so option d is correct.