3961: Amit has five friends : 3 girls and 2 boys. Amit's wife also has 5 friends : 3 boys and 2 girls. In how many maximum number of different ways can they invite 2 boys and 2 girls such that two of them are Amit's friends and two are his wife's ?
(A) 46
(B) 38
(C) 58
(D) 24
3962: '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
3963: The problem of international liquidity is related to the non-availability of
(a) goods and services
(b) gold and silver
(c) dollars and other hard currencies
(d) exportable surplus
3964: What does the term Dolby B, or Dolby C printed on tape recorders and other sound system refer to?
(a) Frequency modulated system
(b) Amplitude modulated system
(c) Noise reduction circuit
(d) Both DC and AC power can be used.
3965: The chief constituent of gobar gas is:
(a) Hydrogen
(b) Nitrogen
(c) Ethane
(d) Methane