If A is true, write A. if B is true, write B. If both statements are true, write C. If both are false, write D.
A. Explosives and reworks combust to create flame and spark.
B. Halides combine with alkali to upgrade its orbital order.
Here is the answer: "D". An explosion is an ultra-fast release of gaseous products, which is not always accompanied by a combustion. For example, XeO3, Pb(N3)2 can't combust.
Halides is not always react with alkali. For example, NaOH isn't react with NaCl.