Following is the extract of the Balance Sheet of Vikalp Ltd. as per Schedule-III, Part-I of Companies Act as at 31st March, 2024 along with notes to accounts : 
(i) The total face value of equity shares issued during the year 2023-24 was :
Study the given molecular structure of double-stranded polynucleotide chain of DNA and answer the questions that follow. 
(a) How many phosphodiester bonds are present in the given double-stranded polynucleotide chain?
(b) How many base pairs are there in each helical turn of double helix structure of DNA? Also write the distance between a base pair in a helix.
(c) In addition to H-bonds, what confers additional stability to the helical structure of DNA?