Right option is (b) Glass electrode
To explain: Glass electrode is one in which the sensing element is a very thin hydrated glass membrane which generates a transverse electrical potential. The electrical generated is due to concentration-dependent competition between the cations for specific binding sites. In glass pH electrode, the diffusion of gas through the membrane causes a change in pH between the membrane and the electrode, which can be determined later. Solid-state electrodes has thin membrane of a specific ion conductor made from a mixture of silver sulphide and a silver halide. Thermistor is used to measure the heat generated.