Match the coordination given in Column I with the central metal atoms given in Column II and assign the correct code.

Column I 

(Coordination compound)

Column II

(Central metal atom) 

A. Chlorophyll 1. Rhodium
B. Blood pigment 2. Cobalt
C. Wilkinson's catalyst  3. Magnesium
D. Vitamin B12  4. Iron 

Codes:

Options:  A   B   C   D 
1. 2 3 4 1
2. 3 4 1 2
3. 1 4 3 2
4. 4 1 3


 


 




Hint: Blood pigment contains iron.

Central metal ions present on coordination compounds determine the properties of coordination compounds and their biological role.

Column l 

(Coordination compound)

Column 

(Central metal atom) 

A. Chlorophyll 1. Magnesium
B. Blood pigment 2. Iron 
C. Wilkinson catalyst  3. Rhodium
D. Vitamin B  4. Cobalt

Hence, the correct answer is the second option.