Hello ANUPAM ,
as you are a Graduate fresher & from Specialization Brach Instrumentation, many oppurtunities are looking for Right candidate , you may start as an Intern in any Company, t, there are many public & pvt sectors for Instrumentation, like ECIL, TATA, MEDICAL INSTRUMENTATION, top Product based companies like Texas Instrumentations TI, Analog Devices, Meditronic, Robo Si..... many more