1. Different kinds of specialized surgical instruments were in common use by 1st century AD.
2. Transplant of internal organs in the human body had begun by the beginning of 3rd century AD.
3. The concept of sine of an angle was known in 5th century AD.
4. The concept of cyclic quadrilaterals was known in 7th century AD.
Select the correct answer using the codes given below:
Correct Answer: (c) 1, 3 and 4 only
Solution:Ist, 3rd and 4th are correct.
India has been contributing to the fields of science and technology since ancient times. Even today, what we term as ‘traditional knowledge’ is actually based on scientific reasoning. Technology is today defined as applied science, but early humans developed technologies such as stone-working, agriculture, animal husbandry, pottery, metallurgy, textile manufacturing, woodcarving, boat-making, and sailing.
The first stone tools in the Indian subcontinent go back more than two million years.
The Neolithic revolution saw the development of agriculture in parts of the Indus and the Ganges valley, which in turn triggered the need for pots, water management, metal tools, transport, etc.
Metallurgy brought about significant changes in human society as it gave rise to an entirely new range of weapons, tools, and implements.