General electronic configuration of actionoids is (n−2)f¹⁻¹⁴(n−1)d⁰⁻²ns2. Which of the following actinoids have one electron in 6d orbital?
A U (Atomic no. 92)
B Np (Atomic no. 93)
C Pu (Atomic no. 94)
D Am (Atomic no. 95)