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If 2+i and sqrt5-2i are the roots of the...

If `2+i` and `sqrt5-2i` are the roots of the equation `(x^(2)+ax+b)(x^(2)+cx+d)=0` where, a,b,c,d are real contstants, then product of all roots of the equation is

A

40

B

`9sqrt5`

C

45

D

35

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