Question

19 If three resistors of resistance R1 ,R2,R3 are connected in series, then effective resistance of the combination is
R1 R2-23
R1 R2+R3
R1 +R2+R3
R1 R2 R3​

Answer 1

R1+ R2+ R3 is your answer mate

Answer 2

✒ if three resistors of resistance R1,R2,R3 are connected in series then effective resistance of the combination is

$\implies\bf{Effective \: resistance =R_1+R_2+R_3 ........if connected in series }$