What type of DNA is found in humans?

The type of DNA found in humans at neutral pH and physiological salt concentrations is B-DNA. 

B-DNA is the classic form of DNA. It features a right-handed double helical structure with the two DNA strands flowing in opposite directions. The strands have an uneven structure with alternating primary grooves and minor grooves. It has a winding width of 2 nm. 

The core of B-DNA is composed of nitrogenous bases and the backbone is composed of sugar phosphates linked together by phosphodiester linkages.