UPSC CSE Prelims
Question 11
Consider the following statements:
- Maize can be used for the production of starch.
- Oil extracted from maize can be a feedstock for biodiesel.
- Alcoholic beverages can be produced by using maize.
Which of the statements given above is/are correct?
View correct answer and explanation
Correct answer: D
Correct Option: D
Explanation: Maize has multiple industrial uses: corn starch, oil suitable for biodiesel processing and fermentable starch for alcohol production.
Statement/Pair-wise Analysis:
Statement/Item 1: Correct - Corn kernels are a major commercial source of starch.
Statement/Item 2: Correct - Maize/corn oil can be converted into biodiesel by transesterification.
Statement/Item 3: Correct - Maize starch can be converted to sugars and fermented to ethanol for beverages.
Option-wise Analysis:
A: Incorrect - omits correct statement/items 2, 3.
B: Incorrect - omits correct statement/item 3.
C: Incorrect - omits correct statement/item 1.
D: Correct - includes all and only the correct items.