Among the following the Mnewmann projections of meso 2, 3 butanediol are

Among the following, the Newmann projection formula of meso-2, 3-butanediol are / is

Which of the following structures is not meso 2,3-butanediol ?

Among the following which one can have a meso form?

Among the following which one can have a meso form?

Which of the following structure is not meso-2,3-butanediol ?

Which of the following conformations of meso 2,3-dibromobutane will give bromoalkene with alcoholic KOH ?