3976: Rennin and lactase, the enzymes required to digest milk, disappear in the human body by the age of
(a) two
(b) three
(c) five
(d) eight
3977: A ship sailing from the eastern extremity of the Aleutian Islands to Dutch harbour crosses 180° meridian at 23.30 hrs on January 1, 1999. What time and date will be recorded by the captain of the ship in his diary after one-hour journey from the point of crossing of the meridian ?
(a) January 1, 0030 hrs
(b) January 2, 0030 hrs
(c) January 3, 0030 hrs
(d) January 4, 0030 hrs
3978: Blood grouping was discovered by:
(a) Landsteiner
(b) Robert Koch
(c) William Harvey
(d) Louis Pasteur
3979: Who was the Speaker of the first Lok Sabha ?
(a) G. V. Mavalankar
(b) K. M. Munshi
(c) Hukam singh
(d) U. N. Dhebar
3980: Ram and Shyam work on a job together for four days and complete 60% of it. Ram takes leave then and Shyam works for eight more days to complete the job. How long would Ram take to complete the entire job alone?
(a) 6 days
(b) 8 days
(c) 10 days
(d) 11 days