2311: With reference to the scientific progress of ancient India, which of the statements given below are correct?
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 :
(a) 1 and 2 only
(b) 3 and 4 only
(c) 1, 3 and 4 only
(d) 1, 2, 3 and 4
2312: In an examination, every candidate took Physics or Mathematics or both 65.8% took Physics and 50.2% took Mathematics. The total number of candidates was 2000. How many took both Mathematics and Physics ?
(a) 750
(b) 700
(c) 550
(d) 500
2313: Uplift of the backward classes was the main programme of the
(a) Prathana Samaj
(b) Satyashodhak Samaj
(c) Arya Samaj
(d) Ramakrishna Mission
2314: Which one of the following statements is not correct ?
(a) All echinoderms are viviparous
(b) Round worm has no circulatory system
(c) In bony fishes, swim bladder is usually present
(d) In cartilaginous fishes, fertilisation is internal
2315: 'Gadgil Committee Report' and 'Kasturirangan Committee Report', sometimes seen in the news, are related to
(a) constitutional reforms
(b) Ganga Action Plan
(c) linking of rivers
(d) protection of Western Ghats