NIACL Model Paper 2 with solutions for free online practice

(a) By just changing the timing of drug administration, the researchers could reprogram internal rhythms of reactive-species production.
Part (A): ‘changing’ will replace the ‘change’Part (B): preposition ‘to’ will get replaced by ‘or Part (D): ‘reprogrammed’ will replace ‘reprograinme’ Thus, option (c) is the correct alternative.