Select the most appropriate word to fill in the blank. A concerted effort has to be made in order to use our mineral resources in a planned and ______ manner. (a) reserved (b) collected (c) preserved (d) sustainable

Options

A. reserved
B. collected
C. preserved
D. sustainable

Explanation

sustainable- सतत -able to be maintained at a certain rate or level.
(a) reserved -आरक्षित -slow to reveal emotion or opinions.
(b) collected- brought together in one volume or edition.
(c) preserved- संरक्षित -maintain (something) in its original/existing state.