1916: Examine the following :
Ashok is older than Suresh. Raju is older than Ashok and Vivek is not older than Suresh, Which one of the following statements must necessarily be true?
I. Vivek is as old as Ashok
II. Vivek is as old as Raju
III. Vivek is as old as Suresh
IV. Suresh is younger to Vivek
(a) Only I
(b) Only II
(c) Only III
(d) Either III or IV
1917: Assertion (A) :
A man standing on a completely friction-less surface can propel himself by whistling.
Reason (R) :
If no external force acts on a system, its momentum cannot change.
(a) Both A and R are true, and R is the correct explanation of A
(b) Both A and R are true, but R is not a correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
1918: Which of the following professional (s) are more likely to run the risk of a permanent change in their cell's DNA ?
I. Researchers using carbon-14 isotope
II. X-ray technician
III. Coal miner
IV. Dyer and Painter
Select the correct answer by using the codes given below :
(a) II alone
(b) I, II and III
(c) I, II and IV
(d) I, III and IV
1919: The chief ingredient of the mosquito repellent cream is derived from:
(a) Tulsi
(b) Neem
(c) Lemon
(d) Rice bran
1920: India has Parliamentary democracy system because:
(a) Members of the Lok Sabha are elected by the public
(b) Council of Ministers is responsible to the Legislature
(c) Of distribution of power between the Centre and the States
(d) Of a single constitutional framework