Which among the following statements are correct?
A. `underset(* *)overset(* *)CF_(2)` is more stable than `overset(* *)C Cl_(2)`
B. `overset(* *)C Cl_(2)` is more stable than `overset(* *)CBr_(2)`
C. Singlet `overset(* *)CH_(2)` is more stable than triplet `overset(* *)CH_(2)`
D. Singlet `overset(* *)CH_(2)` has planar geometry