Which of the following statements are correct regarding the salient features of DNA double helix?(a) It is made of two polynucleotide chains, where the backbone is constituted by sugar-phosphate, and the bases project outside.(b) The two chains have anti-parallel polarity. It means, if one chain has the polarity 5'→3', the other has 3'→5'. (c) There are roughly 10 bp in each turn of double helix.