516: In a tournament each of the participants was to play one match against each of the other participants. 3 players fell ill after each of them had played three matches and had to leave the tournament. What was the total number of participants at the beginning, if the total number of matches played was 75 ?
(A) 12
(B) 10
(C) 8
(D) 15
517: Which one of the following pairs of composers in different languages and their works on the Mahabharata theme is correctly matched ?
(a) Sarladasa --Bengali
(b) Kasirama -- Oriya
(c) Tikkana -- Marathi
(d) Pampa -- Kannada
518: A father is now three times as old as his son. Five years back, he was four times as old as his son. The age of the son is
(a) 12 years
(b) 15 years
(c) 18 years
(d) 20 years
519: Which of the following pairs is/are correct?
(A) Main root : Storage
(B) Lateral root : Absorption
(C) Root hair : Conduction
(a) Only A
(b) A and C
(c) All are correct
(d) None of the above
520: There are only two known examples of cave paintings of the Gupta period in ancient India. One of these is paintings of Ajanta caves. Where is the other surviving example of Gupta paintings ?
(a) Ellora caves
(b) Bagh caves
(c) Nasik caves
(d) Lomas Rishi cave