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No. B.Com candidate cannot pursue the same. If someone wants to pursue this course he/she needs to be graduate in engineering or B.Sc with PCM.

 Electronics & Communication is perhaps an evergreen subject of study. Research in this field is going on for any years and I am sure it will continue for years to come. Just have no worries in this aspect. You will have plenty of job opportunities after obtaining your doctorate.

Geology is the primary Earth Science and looks at how the earth formed, its structure and composition, and the types of processes acting on it. Geology is the study of the Earth. Generally, geologists study how the Earth works, both today and in the past. We like to think of geology as the 'liberal arts' of the sciences. That's because geology takes ideas from math, physics, chemistry, and biology and applies them to the Earth.