For the rate law rate=k (a)3(b)4, the reaction is [ select ] in a, [ select ] in b, and [ select ] over all.
a) First order in a, Second order in b, Overall order is 7
b) Third order in a, Fourth order in b, Overall order is 12
c) Third order in a, Fourth order in b, Overall order is 7
d) First order in a, Second order in b, Overall order is 12