#Combinational circuit

Question

Consider a combinational block which takes 4-bits input (say ABCD) and results two times circular right shifted version of input as output. The minimum number of gates required to implement this logic is___________ (Fill in the blanks)

Answer 1

No need of any gates

$A_{out} = C_{in}$

$B_{out} = D_{in}$

$C_{out} = A_{in}$

$D_{out} = B_{in}$