Direction: Spot the grammatical errors in the given sentence. Mark the part with error as your answer. If there is no error, mark "No error" as the answer. (Ignore punctuation error)

Volunteers of an -NGO (a)/ interacted with school students (b)/ to spread awareness about (c)/ environment related issues. (d)/ No error (e)

[PUNJAB & SIND BANK (PO), 2010]