Correct Answer & Explanation
Option B
• 'Deficient' means not having enough of a specified quality or ingredient; lacking.
• 'Scarce', 'inadequate', and 'insufficient' are all synonyms of 'deficient', indicating a lack or shortage.
• 'Abundant' means existing or available in large quantities; plentiful.
• Therefore, 'abundant' is the direct opposite of 'deficient'.