3151: A radioactive substance has a half-life of four months. Three-fourth of the substance would decay in

(a) 3 months

(b) 4 months

(c) 8 months

(d) 12 months
3152: During cardiac failure, which of the following is advised as a first aid ?

(a) Mouth to mouth resuscitation

(b) Giving external cardiac massage

(c) Giving cool water to drink

(d) Giving complete body massage
3153: Match List I (Name of the Lady) with List II (Achievement) and select the correct answer using the codes given below the lists:
List I List II
(Name of the lady) (Achievement)
A. Chinna Pillai 1. Winner of Neerja Bhanot Award
B. Kaveri Thakur Puraskar 2. Recipient of Stree Shakti
C. Mira Nair 3. Became the fastest swimmer in Asia at the age of 16 years
D. Yasoda Ekambaram 4. Recipient of the Golden Lion at Venice Film Festival
Codes:
A B C D
(a) 3 2 1 4
(b) 2 3 4 1
(c) 3 2 4 1
(d) 2 3 1 4
3154: Which one of the following authorities recommends the principles governing the grants-in-aid of the revenues to the states out of the Consolidated Fund of India?

(a) Finance Commission
(b) Inter-State Council
(c) Union Ministry of Finance
(d) Public Accounts Committee
3155: Which one of the following countries is land locked?

(a) Bolivia
(b) Peru
(c) Suriname
(d) Uruguay