2746: The age of a man is three times the sum of the ages of his two sons. Five years hence, his age will be doubled of the sum of the ages of his sons. The father's present age is
(a) 40 years
(b) 45 years
(c) 50 years
(d) 55 years
2747: Consider the following statements:
1. India has ratified the Trade Facilitation Agreement (TFA) of WTO.
2. TFA is a part of WTOs Bali Ministerial Package of 2013.
3. TFA came into force in January 2016.
Which of the statements given above is/are correct?
(a) 1 and 2 only
(b) 1 and 3 only
(c) 2 and 3 only
(d) 1, 2 and 3
2748: Which one of the following is not a digestive enzyme in the human systems?
(a) Trypsin
(b) Gastrin
(c) Yellow and violet
(d) Indigo and yellow
2749: Elizabeth Hawley is well-known for her writings relating to which one of the following?
(a) Historical monuments in India
(b) Regional dances in India
(c) Himalayan expeditions
(d) Wildlife in India
2750: 'RNA interference (RNAi)' technology has gained popularity in the last few years. Why?
1. It is used in developing gene silencing therapies.
2. It can be used in developing therapies for the treatment of cancer.
3. It can be used to develop hormone replacement therapies.
3. It can be used to produce crop plants that are resistant to viral pathogens.
Select the correct answer using the code given below.
(a) 1, 2 and 4
(b) 2 and 3
(c) 1 and 3
(d) 1 and 4 only