Which of the following phrases (I), (II), and (III) given below each sentence should replace the phrase printed in bold letters to make the sentence grammatically correct? Choose the best option among the five given alternatives that reflect the correct use of phrase in the context of the grammatically correct sentence. If the sentence is correct as it is, mark (e) i.e., “No correction required” as the answer. 

Many centuries of European history have been marked by war almost ceaseless between France and England when these two states first confronted each other in America.
I. had been marked
II. has been marked
III. is being marked

The marshy gas which is produced on decomposition of organic matter and is mostly found in coal mines, is the name of that gas?

World Poetry Day is celebrated on which of the following dates?

Which of the following is not a simple tissue?

What amount will be provided to 8 States affected by floods, landslides, cyclones 'Bulbul' & drought during 2019?

"Din-e-Ilahi" was a?

Which woman of Indian origin has been nominated by US President Joe Biden to the Council on Domestic Assistants for Labor and Labor?

Which is the correct ascending hierarchy of groups of taxonomy in taxonomy?