The electronic configuration of four elements `L, P, Q` and `R` are given in brackets
`L (1s^(2), 2s^(2), 2p^(4)) , P (1s^(2), 2p^(6), 3s^(1))`
`Q (1s^(2), 2s^(2)2p^(6), 3s^(2)3p^(5)) , R (1s^(2), 2s^(2)2p^(6), 3s^(2))`
The formula of ionic compounds that can be formed between elements are
A. `L_2P, RL, PQ, R_2Q`
B. LP, RL, PQ, RQ
C. `P_2L, RL, PQ, RQ_2`
D. `LP, R_2L,P_2Q, RQ`
