What following quantity is conserved in the following reaction:
?
A) charge
B) lepton number
C) baryon number
D) All of the above.

Question

What following quantity is conserved in the following reaction: 
?
A) charge 
B) lepton number 
C) baryon number 
D) All of the above.

Quizplus · Accepted Answer

Charge, lepton number, and baryon number are all conserved in the given reaction. Charge is conserved because the sum of charges on both sides of the reaction is equal. Lepton number is conserved because the number of leptons on both sides of the reaction is the same (1 electron on each side). Baryon number is conserved because the number of baryons on both sides of the reaction is the same (1 proton on each side). Therefore, all of the above options are correct.

What Following Quantity Is Conserved in the Following Reaction