Help when using UCSC's table browser

Question

[BMK]

I'm using the UCSC table browser to define rsID numbers for coordinates/positions that come from a vcf file. Because I'm entering numerous positions at once, I'm using the define regions option, which requires input using BED formatting (0-start/0-based, half-open).

If I'm interested in defining the rsID for CHROM 1, POS 54618134, which of the following would be correct?

[A] chr1 54618133 54618134
[B] chr1 54618134 54618134
[C] chr1 54618134 54618135

Answer 1

[Pierre Lindenbaum]

the bed file is a zero based, half open interval. So the right way to write the VCF entry : 1:54618134 is

chr1 54618133 54618134