156: Who led the extremists before the arrival of Gandhiji on the political scene for freedom struggle?

(a) Bal Gangadhar Tilak

(b) Dadabhai Naoroji

(c) Gopal Krishna Gokhale

(d) Subhash Chandra Bose
157: Rabies is caused by a

(a) Virus and it affects the nervous system

(b) Virus and it affects the cardiovascular system

(c) Bacteria and it affects the nervous system

(d) Bacteria and it affects the cardiovascular system
158: Four different candles, which can last for 5 hours, 4 hours. 3 hours and 2 hours of burning, respectively, are lit in a room at the same instant and allowed to burn till such time that the three candles in the room get extinguished. The cost of burning each one of these candles is 75 paise per hour. The cost involved is:

(a) Rs. 2.75
(b) Rs. 3.75
(c) Rs. 9.75
(d) Rs. 12.50
159: Which one of the following metals does not form amalgams ?

(a) Zinc

(b) Copper

(c) Magnesium

(d) Iron
160: "3D printing" has applications in which of the following?

1. Preparation of confectionery items
2. Manufacture of bionic ears
3. Automotive industry
4. Reconstructive surgeries
5. Data processing technologies

Select the correct answer using the code given below :

(a) 1, 3 and 4 only
(b) 2, 3 and 5 only
(c) 1 and 4 only
(d) 1, 2, 3, 4 and 5