Match the following columns.

Column I

Column II

A. Molecular oxygen

B. Electron acceptor

C. Pyruvate dehydrogenase

D. Decarboxylation

1. α- ketoglutaric acid 

2. Hydrogen acceptor

3.  Cytochrome-c 

4. Acetyl Co - A

Codes 

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

(a) Molecular oxygen ultimately combines with hydrogen to form water at the end of Electron Transport Chain (ETC).
Cytochrome-c is an electron acceptor in ETS.
Pyruvate dehydrogenase catalyses reaction converting pyruvic acid into acetyl Co- A.
Decarboxylation oxalosuccinate forms α-ketoglutaric acid in a decarboxylation reaction.

Page 231, 233, XI NCERT