By which metals mixture fuse is made​

Explanation:

Fuse wire is made of alloy of lead and tin having low melting point of 200°C.

the answer is b. hope this !

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.