These all three waves are of very high frequency such as frequency of microwave is 300ghz,infrared 430thz so this frequency can't produce these higher waves

The frequency of an electron oscillating at 1 GHz does not correspond to any specific type of electromagnetic radiation. Let's break down the options and understand why option 'D' (none of these) is the correct answer.

a) X-rays:
X-rays have frequencies in the range of 30 petahertz (30 × 10^15 Hz) to 30 exahertz (30 × 10^18 Hz). They are produced by high-energy processes such as electron transitions in atoms or by accelerating charged particles. The frequency of 1 GHz is much lower compared to the frequency range of X-rays. Therefore, an electron oscillating at 1 GHz does not produce X-rays.

b) Microwaves:
Microwaves have frequencies ranging from 300 megahertz (300 × 10^6 Hz) to 300 gigahertz (300 × 10^9 Hz). They are commonly used for communication, heating, and cooking. While 1 GHz falls within the microwave frequency range, it is important to note that microwaves are generated by specialized devices such as microwave ovens or communication systems. An electron oscillating at 1 GHz does not naturally produce microwaves.

c) Infrared rays:
Infrared rays, also known as infrared radiation, have frequencies ranging from 300 gigahertz (300 × 10^9 Hz) to 400 terahertz (400 × 10^12 Hz). They are commonly associated with heat radiation and are used in various technologies, including thermal imaging and remote controls. Again, the frequency of 1 GHz is significantly lower than the infrared frequency range, so an electron oscillating at 1 GHz does not emit infrared rays.

d) None of these:
Since the frequency of 1 GHz does not match the frequencies associated with X-rays, microwaves, or infrared rays, the correct answer is option 'D' (none of these). The given frequency does not correspond to any particular type of electromagnetic radiation.

In conclusion, an electron oscillating at a frequency of 1 GHz does not give rise to X-rays, microwaves, or infrared rays. The frequency is not within the range of any of these types of electromagnetic radiation.