Five persons concert to loot a bank. Two of them, M and N, stay on in the car, with the engine running on, at the entrance of the bank. Three of them X, Y, and Z, enter the bank. X shoots the cashier, and Y and Z loot the cash. Police suddenly reaches the bank and apprehends, Y and Z but X escapes. On seeing the police enter the bank, M and N also run away in the car. Later on, all the five are arrested and charged with the offences of dacoity, looting and murder. M and N plead that they are not guilty of any of the offences, certainly not of murder and looting, as they did not participate in any of these offences. Should their plea prevail?

A. M and N are not liable for committing robbery and murder

B. M and N are at best liable for abetting robbery, but not of committing it

C. Since the looting of the bank was committed in furtherance of the common intention of all the five, M and N are equally liable for looting and murder along with X, Y and Z and thus their defence will not prevail

D. M and N has no complicity in any of the offences

Answer: Option C