The Most Common Molecule in a Molecular Cloud Is:
A)methane $\mathrm { CH } _ { 4 } .$

Multiple Choice

The most common molecule in a molecular cloud is:

A) methane, $\mathrm { CH } _ { 4 } .$
B) molecular hydrogen, $\mathrm { H } _ { 2 }$
C) carbon monoxide, CO.
D) water, $\mathrm { H } _ { 2 } \mathrm { O } .$
E) ammonia, $\mathrm { NH } _ { 3 } .$