Select the correct statements from the following:

(A) EDTA is used in the treatment of lead poisoning
(B) vitamin $B_{12}$ is a coordination complex of Co
(C) chlorophyll is a coordination complex of Fe
(D) Wilkinson catalyst is a rhodium complex used for hydrogenation of alkenes

Choose the correct answer from the options given below:

(A), (B) and (D) only

The correct answer is Option (1) → (A), (B) and (D) only

(A) EDTA is used in the treatment of lead poisoning → Correct (EDTA is a chelating agent used to remove Pb²⁺ and other heavy metals).

(B) Vitamin B₁₂ is a coordination complex of Co → Correct (cobalt in corrin ring, Co³⁺).

(C) Chlorophyll is a coordination complex of Fe → Incorrect (chlorophyll contains Mg²⁺, not Fe; haemoglobin has Fe).

(D) Wilkinson catalyst is a rhodium complex used for hydrogenation of alkenes → Correct ([RhCl(PPh₃)₃] is the famous Wilkinson’s catalyst).