Answer
A. The replacement of the -OH of a carbonyl group with hydrogen.
Work Step by Step
B through D are all wrong since they involve elements other than C, H, and O, (B. S, C. P, D. N) which are not involved in carbonyl or carboxyl groups.
Campbell Biology (12th Edition)
by Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky
Published by
Pearson
ISBN 10:
0135188741
ISBN 13:
978-0-13518-874-3
Chapter 4 - Test Your Understanding - Levels 3-4 - Applying/Analyzing - Page 65: 7
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