If the resistances 3 , 5 , 7 , 9 are in series, then their equivalent resistance( ) is?

If the resistances 3 , 5 , 7 , 9 are in series, then their equivalent

MCQOPTIONS

1.	If the resistances 3 , 5 , 7 , 9 are in series, then their equivalent resistance( ) is?
A.	9
B.	20
C.	24
D.	32
Answer» D. 32