In molecules, $C$, $H$, $O$, and $N$ atoms usually make $\_\_$, $\_\_$, $\_\_$, and $\_\_$ bonds respectively.

• A. $4$, $1$, $2$, $3$
• B. $3$, $2$, $1$, $4$
• C. $2$, $1$, $3$, $4$
• D. $4$, $2$, $3$, $1$

Answer: (A)

Verified step by step guidance

1. Recall the typical valency (number of bonds formed) of each atom in organic molecules based on their common bonding patterns.
2. Carbon (C) usually forms 4 bonds because it has 4 valence electrons and needs 4 more to complete its octet.
3. Hydrogen (H) forms 1 bond since it has 1 valence electron and needs only 1 more to fill its shell.
4. Oxygen (O) typically forms 2 bonds because it has 6 valence electrons and needs 2 more to complete its octet.
5. Nitrogen (N) usually forms 3 bonds as it has 5 valence electrons and needs 3 more to complete its octet.