It is preferred to administer insulin orally to diabetic people than injecting

Q. Why is insulin not administered orally to a diabetic patient?

Q. Name the source from which insulin was extracted earlier. Why is this insulin no more is use by diabetic people?

Q. This section contains 1 Assertion-Reason type question, which has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
इस खण्ड में 1 कथन-कारण प्रकार का प्रश्न है, जिसमें 4 विकल्प (a), (b), (c) तथा (d) दिये गये हैं, जिनमें से केवल एक सही है।

A : Insulin can't be orally administered to diabetic people.
A : इंसुलिन, मधुमेही लोगों को मुख से नहीं दिया जा सकता है।

R : Insulin is injected subcutaneously and reaches target site through blood.
R : इंसुलिन को त्वचा के नीचे अंतःक्षेपित किया जाता है तथा रक्त के माध्यम से यह लक्ष्य स्थल तक पहुँचता है।

Q. Which of the following artificial sweetening agents are preferred for diabetic persons and people who need to control intake of calories?
(correct answer +1, wrong answer -0.25)