621: Phenylketonuria is an example of an in born error of metabolism. This error refers to
(a) hormonal overproduction
(b) atrophy of endocrine glands
(c) inherited lack of an enzyme
(d) non-disjunction
622: To elect the President of India which one of the following election procedures is used?
(a) System of proportional representation by means of a single transferable vote
(b) Proportional representation through list system
(c) Collective voting system
(d) Secondary voting system
623: Which one of the following Articles of the Constitution of India says that the executive power of every State shall be so exercised as not to impede or prejudice the exercise of the executive power of the Union ?
(a) Article 257
(b) Article 258
(c) Article 355
(d) Article 356
624: Who among the following was not sent to Lanka for the propagation of Buddhism?
(a) Rashtriya
(b) Bhadrasaro
(c) Uttriya
(d) Sona
625: Assertion (A) :
Muhammad bin Tughlaq left Delhi, and, for two years lived in a camp called Swarga-dwari.
Reason (R) :
At that time, Delhi was ravaged by a form of plague and many people died.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is not a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true