Final answer:
Compound A with the molecular formula C5H12 undergoes monobromination to produce compound B. When compound B is treated with a strong base, a mixture containing compound C and compound D is obtained.
Step-by-step explanation:
Compound A, with the molecular formula C5H12, undergoes monobromination to produce compound B. When compound B is treated with a strong base, it forms a mixture containing compound C and compound D. The molecular formula C5H12 indicates that compound A consists of 5 carbon atoms and 12 hydrogen atoms. Monobromination of compound A produces only compound B, so compound B must have the same molecular formula C5H12 as compound A. When compound B is treated with a strong base, it forms a mixture containing compound C and compound D.