question_answer

Direction: A report is given below with four blanks I, II, III, and IV which should be filled by the sentences given in P, Q, R and S:

New Delhi, August 4, 2011: The clusters of trails, which fade during winter and reappear in warmer months, could prove___ I ____currently existing on the red planet.

Scientists are convinced water probably flowed across ______ II _______, but have only been able to detect samples of frozen water near the surface.

More than 1,000 dark lines were picked up running off steep slopes at some sites in Mars's southern hemisphere, taken from Nasa's Reconnaissance Orbiter spacecraft.

They measure between half a metre and five metres in width and stretch up to hundreds of metres in length, and are thought to contain a few litres or tens of litres of water each.

The lines, ______ III _____before fading in the autumn.

Scientists claim the temperatures on ___ IV ____for "frozen carbon dioxide and too cold for pure water-

P: to be the first solid evidence of liquid water

Q: the surface of the planet at some distant point in history,

R: the areas of Mars's surface would be too warm

S: On slopes facing Mars's equator, appear to become longer and darker from late spring

Select your answer from the choices given below:

A) I-P,       II-Q,      III-S,     IV-R

B) I-Q,       II-R,      III-P,     IV-S

C) I-S,       II-P,      III-R,     IV-Q

D) I-S,       II-R,      III-Q,     IV-P

E) None of these