Q1. Kattha is extracted from the inner wood of which tree?
A Kul tree
B Kusum tree
C Khair tree Correct
D Mulberry tree
Explanation
Kattha, also called catechu, is obtained by processing the heartwood or inner wood of the Khair tree. This is why Khair is the correct tree for the extraction of kattha used traditionally with betel preparations and in related products. Kul, Kusum and Mulberry are useful trees in their own contexts, but their inner wood is not the standard source of kattha. The question is asking specifically about the source tree, not a general forest product.