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Question is attached in the pic. DOB 2 Pg.415 Q300

Question is attached in the pic.

 

DOB 2 Pg.415 Q300

Question Image
Grade:12th pass

1 Answers

Raheema Javed
156 Points
6 years ago
Dear student
The question is wrong because three options i.e., A, B and E are correct and that is not possible.
Vitamins are of many types, so the type of vitamin discovered should be mentioned. To remove your confusion i have given the explanation below.

Vitamin A
Elmer V. McCollum and M. Davis discovered vitamin A during 1912–1914. In 1913, Yale researchers, Thomas Osborne and Lafayette Mendel discovered that butter contained a fat-soluble nutrient soon known as vitamin A. Vitamin A was first synthesized in 1947.

B
Elmer V. McCollum discovered sometimes around 1915–1916.

B1
Casimir Funk discovered in 1912.

B2
D. T. Smith, E. G. Hendrick discovered B2 in 1926.
Max Tishler and Robert Williams - Inventors of Synthetic Vitamins
Max Tishler invented methods for synthesizing the essential vitamin B2.

Niacin
American, Conrad Elvehjem discovered in 1937.

Folic acid
Lucy Wills discovered in 1933.

B6
Paul Gyorgy discovered in 1934.

Vitamin C
In 1747, Scottish naval surgeon James Lind discovered that an nutrient (now known to be vitamin C) in citrus foods prevented scurvy.It was rediscovered by Norwegians, A. Hoist and T. Froelich in 1912. Vitamin C was the first vitamin to be artificially synthesized in 1935. A process invented by Dr. Tadeusz Reichstein, of the Swiss Institute of Technology in Zurich.

Vitamin D
In 1922, Edward Mellanby discovered Vitamin D while researching a disease called rickets.

Vitamin E
In 1922, University of California researchers, Herbert Evans and Katherine Bishop discovered vitamin E in green leafy vegetables.

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