There are several information's already given in the question. Based on those given information's, the answer can be easily deduced.
Equivalent resistance = 5 + 2 + 12
= 19 ohms
From the above deduction, it can be deduced that the correct option among all the options that are given in the question is the first option or option "A". I hope that this is the answer that has actually come to your desired help.