In the following question, sentences of a paragraph have been jumbled and labelled as A, B, C, and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option.

A. Till date it has no cure.

B. Covid outbreak is the most deadly virus in human history.

C. Research is still at large to find the cure.

D. It has taken numerous lives in the world.