Question

what is GDP. Assit the contribution of secondary and tertiary sector of GDP

Answer 1

GDP stands for Gross Domestic Product. It is the sum total of all goods and services produced within a country in one year. 
The tertiary sector contributes the most to the GDP of the country followed by the secondary sector.

Answer 2

Tertiary Sector plays a great role =
It is the base of primary and secondary sector and it also act as a base for both these sectors in terms of providing services.
Secondary Sector also plays a major role .
This sector involves the manufacturing units .It covers activities in which natural products r changed into usable products.
... * GDP=
Gross Domestic Product=
It is the total value of all the goods produced in a year