Which among the following Op-amps get manufactured by Semiconductor Limited, Pune ?

Which among the following Op-amps get manufactured by Semiconductor Limited, Pune ?

a. CA 741 CT
b. CA 741 T
c. μ A 709
d. All of the above

Correct Answer : c. μ A 709

Explanation :

CA 741 CT & CA 741 T are the Op-amps developed or manufactured by Bharat Electronics Ltd (BEL), Bangalore. These are high-gain operational amplifiers which are absolutely applicable in summer, multivibrator, integrator, differentiator and so on.
μ A 709 is also a high-gain operational amplifier which is constructed on a single chip of silicon by an assistance of planar epitaxial mechanism by Semiconductors Limited, Pune. It's major areas of applications include DC servo systems, analog computers with high impedance values and low-level instrumentation prospects.