4276: With reference to 'stem cells', frequently in the news, which of the following statements is/are correct?

1. Stem cells can be derived from mammals only.

2. Stem cells can be used for screening new drugs.

3. Stem cells can be used for medical therapies.

Select the correct answer using the codes given below :

(a) 1 and 2 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3
4277: Why is it easier to cook in a pressure cooker?

(a) High pressure creates turbulence

(b) More steam is formed inside the cooker

(c) Boiling point of water is raised

(d) Boiling point of water is lowered
4278: Consider the following statements regarding the relations between India and Pakistan:

1. During Shimla Agreement, Indira Gandhi and Zulfikar Bhutto agreed to maintain the sanctity of LoC
2. Lahore Summit took place in the year 1997
3. Islamabad Summit was held between Rajiv Gandhi and Nawaz Sharif

Which of these statements is/are correct?

(a) 1, 2 and 3
(b) 1 and 3
(c) Only 2
(d) Only 1
4279: Six books A, B, C, D, E and F are placed side by side. B, C and E have blue cover and the other books have red cover. Only D and F are new books and the rest are old. A, C and D are law reports and others are Gazetteers. What book is a new law report with a red colour ?
4280: The term Regional Comprehensive Economic Partnership often appears in the news in the context of the affairs of a group of countries known as

(a) G20
(b) ASEAN
(c) SCO
(d) SAARC