21. In India, cluster bean (Guar) is traditionally used as a vegetable or animal feed, but recently the cultivation of this has assumed significance. Which one of the following statements is correct in this context?
The oil extracted from seeds is used in the manufacture of biodegradable plastics
The gum made from its seeds is used in the extraction of shale gas
The leaf extract of this plant has the properties of antihistamines
It is a source of high quality biodiesel
22. If you travel through the Himalayas, you are likely to see which of the following plants naturally growing there? 1. Oak
2. Rhododendron
3. Sandalwood
Select the correct answer using the code given below.
1 and 2 only
3 only
1 and 3 only
1, 2 and 3