mdcat english MCQ #824

Identify the correct prefix to form the antonym of 'valid':

mdcat english MCQ #824

  1. Question 1

    Q1. Identify the correct prefix to form the antonym of 'valid':

    • A) Pre-
    • B) Re-
    • C) In-
    • D) De-

    Answer: In-

    Explanation: Invalid is formed with 'in-'. Other prefixes create different word meanings. Work each step carefully; ISSB math rewards accuracy under time pressure.