In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select "no improvement".
A better example is a person who (has been assigned) the duty of planting trees and watering them along an expressway.
In April 2017, on the birth anniversary of Dr. B. R. Ambedkar which body announced the winners of Lucky Draw Schemes like ‘Lucky Grahak Yojana’ and ‘Digi-Dhan Vyapar Yojana’?