656: A married couple adopted a male child. A few years later twin boys were born to them. The blood group of the couple is 'AB' positive and 'O' negative. The blood group of the three sons is A positive, B positive, and 'O' positive. The blood group of the adopted son is
(a) A positive
(b) B positive
(c) O positive
(d) Cannot be determined
657: Who of the following Prime Ministers sent Cripps Mission to India?
(a) Neville Chamberlain
(b) Stanley Baldwin
(c) Winston Churchill
(d) James Ramsay MacDonald
658: Amniocentesis is a method for:
(a) Determination of foetal sex.
(b) Separation of amino acids.
(c) Determination of the sequence of amino acids in a protein.
(d) Inducing abortion.
659: Phytotron is a facility to
(a) grow plants under disease-free conditions
(b) conserve endangered species of plants
(c) grow plants under controlled conditions
(d) induce mutations
660: With reference to Agni - IV Missile, which of the following statements is / are correct ?
1. It is a surface-to-surface missile.
2. It is fuelled by liquid propellant only.
3. It can deliver one-tonne nuclear warheads about 7500 km away.
Select the correct answer using the code given below:
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3