916: The product life cycle from inception to demise is shown in the graph. Match List I with List II and select the correct answer using the codes given below the Lists :

Codes:

(a) I-A, II-D, III-B, IV-C
(b) I-A, II-D, III-C, IV-B
(c) I-D, II-A, III-B, IV-C
(d) I-D, II-A, III-C, IV-B
917: Chemical composition of pearl is:

(a) Calcium carbonate

(b) Calcium carbonate and magnesium carbonate

(c) Calcium sulphate

(d) Calcium chloride
918: Consider the following statements:

1. The Constitution of the United States of America came into force in the year 1810.

2. All revenue bills must originate in the House of Representatives of the US Congress.

3. George W. Bush is the only President in the history of the Unites States of America whose father was also the President of the United States of America.

Which of the following statements given above is/are correct?

(a) 1 only
(b) 2 only
(c) 1 and 2
(d) 2 and 3
919: Pampas are the vast grassy plains of:

(a) South America

(b) North America

(c) Africa

(d) Eurasia
920: A thief running at 8 km/hr is chased by a policeman whose speed is 10 km/hr. If the thief is 100 metres ahead of the policeman, then the time required for the policeman to catch the thief will be

(a) 2 minutes

(b) 6 minutes

(c) 10 minutes

(d) 3 minutes