636: Consider the following statements :
I. Tapeworm is a hermaphrodite.
II. Round-worm has separate sexes.
III. Filaria is caused by a nematode.
IV. Guinea-worm is an annelid.
Which of these are correct ?
(a) I and II
(b) I, II and III
(c) III and IV
(d) II, III and IV
637: With reference to medieval Indian rulers, which one of the following statements is correct ?
(a) Alauddin Khalji first set up a separate ariz's department
(b) Balban introduced the branding system of horses of military
(c) Muhammad bin Tughlaq was succeeded by his uncle to the Delhi throne
(d) Firoz Tughlaq set up a separate department of slaves
638: Scratching eases itching because
(a) it removes the outer dust in the skin
(b) it kills the germs
(c) it stimulates certain nerves which direct the brain to increase the production of antihistaminic chemicals
(d) it suppresses the production of enzymes which cause itching
639: Who was the first Indian actress to receive the Padma Shri Award ?
(a) Samita Patil
(b) Nargis Dutt
(c) Meena Kumari
(d) Madhubala
640: Chapchar Kut is a festival celebrated in the state of
(a) Arunachal Pradesh
(b) Assam
(c) Mizoram
(d) Sikkim