2. With reference to the scientific
progress of ancient India, which
of the statements given below are
correct? (UPSC / IAS 2012 )
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: