Which of the following is the structure of purine? 
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Human Resource Management
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The body of economic thought and theories that are widely accepted and taught across major universities and employed in policy-making by most governments.
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Q9: Which compound has the lowest pKa?<br>A)(CH<sub>3</sub>CH<sub>2</sub>O<sub>2</sub>C)<sub>2</sub>CH<sub>2</sub><br>B)CH<sub>3</sub>CH<sub>2</sub>O<sub>2</sub>CCH<sub>2</sub>CHO<br>C)CH<sub>3</sub>CH<sub>2</sub>COCH<sub>2</sub>CHO<br>D)PhCOCH<sub>2</sub>COCH<sub>3</sub><br>E)(NC)<sub>2</sub>CH<sub>2</sub>
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