(A): Fuse wire must have low resistivity and low melting point.
(R): Fuse is used to protect a device connected in series to it from large currents. 

Options

A. Both 'A' and 'R' are true and 'R' is the correct explanation of 'A'
B. Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A'
C. 'A' is true and 'R' is false
D. 'A' is false and 'R' is false

Answer

A