UPSC Previous Year Questions: CSP 2021

sankalpr91said

upsc2020said

201. 

B, C, D are factually correct. Thus, by elimination, A should be wrong. 

But, I don't see anything wrong with the statement. Can anyone explain ?

upsc2020said

222. Which one of the following elements is essential for the formation of chlorophyll in green plants?

a) Calcium

b) Iron

c) Magnesium

d) Potassium