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Let f (x) =1+ 1/2+ 1/3+ 1/4 + ……… + 1/n ...

Let `f (x) =1+ 1/2+ 1/3+ 1/4 + ……… + 1/n` such that `P (n) f (n+2) = P ( n) f (n) + q (n).` Where `P (n) Q(n)` are polynomials of least possible degree and `P (n)` has leading coefficient unity. Then match the following Column-I with Column-II.

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The correct Answer is:
`AtoS; BtoP; CtoQ; DtoR`
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