As you want to get the details of best option between Civil Engineering and Mechanical Engineering so here is the information of the same for you:

Civil engineering and mechanical engineering are both core branches of engineering and one of the most primiative branches of engineering.

There are good scope in both the branches.

However mechanical branch offers much wider range of options.

As there are lot of subfields in mechanical engineering like thermodynamics, fluid mechanics, machine design, sheet metal, tool and dies design etc.

You can get jobs in design, development, production, sales and marketing, commissioning, technical support, service etc. while in civil options are limited to design and development of structural bodies like dams, bridges, roads etc.

You should also think about your interest first and then choose.