Step 1: Understanding the Question:
The question looks at the aim of Indian art in the time before the British. We need the option that matches the pre-colonial pattern of art making.
Step 2: Think about who paid for art:
Kings, nobles, temples and monasteries paid for art. They wanted palaces and shrines to look rich and stories from religious books to be shown in pictures. This points to decoration and illustrated books.
Step 3: Use the timeline method:
Put the four options on a timeline. Realism, academic study with museums and export art all belong to the British era (after about 1750). Only decoration and manuscript illustration belongs to the earlier centuries, from the Ajanta murals to the Mughal and Rajput books.
Step 4: Eliminate the later purposes:
Options (1), (2) and (4) all describe changes that came with colonial rule, art schools and trade. They cannot describe art before the British. So they are wrong.
Step 5: Confirm the remaining option:
Option (3) fits what we know from surviving work such as temple walls, palm leaf manuscripts and court albums, so it is correct.
Step 6: Cross-check the other options.
Option (1) describes copying the visible world, which colonial teaching pushed later. Option (2) needs museums and academies, and these were set up by the British in the 1800s. Option (4) needs an overseas market, which grew with the Company School. Each of these three belongs to a later time, so none can describe the earlier period. Only option (3) belongs to temples, courts and illustrated books of the earlier centuries.
Final Answer:
The earlier purpose was decoration and manuscript illustration, which is option (3).