Traditional occupation of India ------.
A. Agriculture
B. Business
C. Defense
D. None of these

Hint: Traditional occupation, 'traditional occupation' means an occupation followed in a family in which it is handed down by an ancestor to his posterity. If there is a set of the population following an occupation of that description that can be regarded as a class.

Complete answer:
The traditional occupation of India is agriculture because 66% of the total population is engaged with agriculture. Agriculture is the backbone of the country. India was known as a self-sufficient country when agriculture was the backbone of the country. People residing in rural areas depend mostly on agriculture. It is the primary sector of the Indian economy. Highest number of people depend on agriculture in India.
Agriculture is divided into three categories; arable farming, pastoral farming, and mixed farming. In an arable agriculture system crops are grown in fields, for example, wheat, paddy etc. While pastoral farming is the system which is considered by raising animals and producing livestock. In a mixed farming arable and pastoral farming system both are mixed together.
Plantation agriculture is in the new trend nowadays. The income and earnings is the key factor for the development of any system and plantation agriculture system plays a main role in development for farmers. Plantation comes under commercial farming which focuses mainly on commercial crops that give a good profit and they can be grown in all the seasons.
So, the correct answer is Option A.

Note: In India, about 66 percent of the total population is engaged only in agriculture which is the primary sector of the occupational system of India. The Remaining 13% and 20% population depended on secondary and tertiary sectors respectively.