For colourless solution obtained in column-3 , the incorrect option is :

Options

A. 3,b,R
B. 4,b,P
C. 3,a,Q
D. 4,b,R

Answer

C

Explanation

`Cu^(2+)+"excess"CN^(-)to underset("colourless sol")([Cu(CN)_4]^(3-))`
`Cu^(+) , 3d^(10) implies sp^3` , diamagnetic & tetrahedral
`Zn^(2+)+"excess"NH_3(aq)tounderset("Colourless solution")([Zn(NH_3)_4]^(2+))`
`Zn^(2+), 3d^10 implies sp^3` tetrahedral diamagnetic