1136: The following are the rulers of the slave dynasty:
I. Ghiyas-ud-din Balban
II. Iltutmish
III. Qutb-ud-din Aibak
IV. Nasir-ud-din Mahmud
The correct order in which these sultans ruled over India is
(a) II, III, I, IV
(b) I, IV, II, III
(c) IV, I, II, III
(d) III, II, IV, I
1137: Optical fibre works on the principle of
(a) total internal reflection
(b) refraction
(c) scattering
(d) interference
1138: MILD : NKOH :: GATE : __?__
(a) HCWI
(b) HCWT
(c) HWCT
(d) EYRC
1139: Why could British only succeed in trade and commerce in India?
(a) Because of government backing
(b) Quality of merchandise
(c) Naval superiority
(d) All of the above
1140: 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