The cause of Osgoods syndrome is unknown, nor is it known

Question

The cause of Osgoodâ€™s syndrome is  unknown, nor is it known  why the disease appears to be increasing in the United States.

(A) unknown, nor is it known
(B) unknown, neither do they know
(C) not known, nor do they know
(D) not known, unknown too is
(E) not known, neither do they know

gayathri · Answer

OA is A

vprabhala · Answer

is it necessary that nor should be preceded by neither?

praveen_rao7 · Answer

this is from president Ab lincoln's one of the speaches "I am not, nor ever have been, in favor of bringing about in any way the social and political equality of the white and black races" Source https://en.wikiquote.org/wiki/Abraham_Lincoln Hence it is not necessary to have neither before nor

Folaa3 · Answer

No it isn't necessary that nor be preceeded by neither. See this link where it is explicitly stated https://webster.commnet.edu/grammar/conjunctions.htm

vprabhala · Answer

thanks.. for the explanation... is really helpful.

The cause of Osgoods syndrome is unknown, nor is it known

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