Concept:The verb form is incorrect: "found" (meaning to discover) is confused with "founded" (meaning to establish).Explanation:(a) "Rabindranath Tagore" – no error.(b) "a Nobel laureate and the author of the national anthem" – no error.(c) "found Shantiniketan" – error. The correct verb is "founded" because Tagore established Shantiniketan, not discovered it.(d) No error – not applicable since there is an error.Correct sentence: Rabindranath Tagore, a Nobel laureate and the author of the national anthem, founded Shantiniketan.Answer:Part (c) has the error.